{"id":1047,"date":"2019-02-17T07:27:53","date_gmt":"2019-02-17T07:27:53","guid":{"rendered":"https:\/\/blogs.glowscotland.org.uk\/gc\/hchemanswers\/?page_id=1047"},"modified":"2019-09-09T09:22:07","modified_gmt":"2019-09-09T09:22:07","slug":"marking-guide-unit-3g1-bond-enthalpy","status":"publish","type":"page","link":"https:\/\/blogs.glowscotland.org.uk\/gc\/hchemanswers\/marking-guide-unit-3g1-bond-enthalpy\/","title":{"rendered":"MARKING GUIDE: Unit 3G1 \u2013 Bond Enthalpy"},"content":{"rendered":"<p>&nbsp;<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"50\">1.<\/td>\n<td>B<\/td>\n<td width=\"5\"><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>2.<\/td>\n<td>\u00a0D<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>3.<\/td>\n<td>\u00a0A<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>4.<\/td>\n<td>\u00a0B<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>5.<\/td>\n<td>\u00a0B<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>6.<\/td>\n<td>\u00a0D<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>7.<\/td>\n<td>\u00a0C<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>8.<\/td>\n<td>\u00a0C<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>9.<\/td>\n<td>\u00a0A<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>10.<\/td>\n<td>\u00a0B<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"50\">11.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>\u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1266\" src=\"https:\/\/blogs.glowscotland.org.uk\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture5-1.png\" alt=\"\" width=\"953\" height=\"503\" srcset=\"https:\/\/blogs.glowscotland.org.uk\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture5-1.png 995w, https:\/\/glow-prod-gc.s3.eu-west-1.amazonaws.com\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture5-1-300x158.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEGwaCWV1LXdlc3QtMSJIMEYCIQCwxCml9wzFamWbdzDVIsVVaUfPWayyVs6Xe4WEsVkVOAIhAP2MYRgxqjNTNPc%2BxHaYzFGhd80FKEBs4r6FvmyMX9yiKrgFCDUQBRoMMjczNTcwMTk1NDMzIgyT%2FhHZHwVkcGVzY%2BgqlQXiGFYafSHV0HRdGy3qQ2lndSsZ%2FDubySFPAWKxvFSAdWsLvI3iqNq2PIS29wOUQWWc3Bpw%2BOsgEd8HXu2V0UZ2%2FOJDj7JHjaXXzw4koqouf0ZKCMgAXGA8s2hAv9bXtzyZ4iQkJ4urSJLnqyAc8OVOwDd%2Fu9Aw4KDaMIF%2BgOtXtCidlIrbFBp8Ay2KU%2Fd8CkJUvZQRiY9nbbZpANDG%2Bdn8KEVh45YsNvjDvky9InmxxrfqDmGIZUIwJcOiYS%2FGn%2BFymX%2BCWDpPe9yrDYtTwn23FiETTGjpOqB166g8yBbLOmCsC0Gi1lFDmRaksahpQkosLCjVvx6lmg%2F2Ek%2Bltn5V9ZLSmycUfzlPW4uG35o4me4op4XlWcpdrfeI2Am%2BcB93SKl4pysSeRTqKy3tGgYfTzSHrrV4qk3cwx2Lk3Snh6VVS3PbQ158YRjJzN0fOwpPiDiXH4RQomB46yQNcY1kz7IkeEjKZAUlsnAvKeX%2BVtdhTKzllyB%2FIHgIIHT6ovnBAGmENwR1AmFNH8Fa5hTUun58nsL6lX5YdxEGJ32dtlyxDUdT8dbfjeiaroNruzPxjpHl78Fpjm5JkUAyxFZi%2FaReFkLLmF2%2B3KyA4oXUp9nyvko5xUqvs4lxgjW4LUTE8972jUyIeGQGxJbASt9P1bYEN%2FAQcTgewemdaE98LiE%2FiKz%2B3UP4KWPz8t8NI%2FYZErqQBkFA%2Fw%2Fy%2By4l6Bz2HyXlI%2B%2FlIVAW4pwVyieiw4jyW9ZrB6CPHasILD88h4B4zRbHO0nVMgrhn3rm4y3%2Ftl7IijlJ4cNiIus7Jr%2FvkC1RYfJnlQOXXmglhv9IynRHfCWw0BPFL4tYvU3Khv0wqW5moupzRl1Umoj8GzByfBTgwZuqMLSu5c4GOrABT1kKypxFpftR6fJ7uAEem6BO9dPJoK1jKwh3XrcUPzZaaP5QcaNHfdUTKAq4uf6XfqI2rP5yYidm8PpFN%2FcMoYiymHUSU83LorqYnJDXdTH6Qt9RY1Q9x364FpOfVxy72QN384bcsoGsik5xVZvZC7ZWSn0ynQ520fMBKLAGLZ4IoTiiGDA9pUrr07XP68cjozh7WKFdTCjbEbCROALdloHTjVeO67Ku2VKUnSLRUi0%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U5WHHB5ER%2F20260410%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260410T203803Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=784bfa20a9b1abcd978ef1dad18cb42d100b3b814388395f221f870e6513c27e 300w, https:\/\/glow-prod-gc.s3.eu-west-1.amazonaws.com\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture5-1-768x404.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEGwaCWV1LXdlc3QtMSJIMEYCIQCwxCml9wzFamWbdzDVIsVVaUfPWayyVs6Xe4WEsVkVOAIhAP2MYRgxqjNTNPc%2BxHaYzFGhd80FKEBs4r6FvmyMX9yiKrgFCDUQBRoMMjczNTcwMTk1NDMzIgyT%2FhHZHwVkcGVzY%2BgqlQXiGFYafSHV0HRdGy3qQ2lndSsZ%2FDubySFPAWKxvFSAdWsLvI3iqNq2PIS29wOUQWWc3Bpw%2BOsgEd8HXu2V0UZ2%2FOJDj7JHjaXXzw4koqouf0ZKCMgAXGA8s2hAv9bXtzyZ4iQkJ4urSJLnqyAc8OVOwDd%2Fu9Aw4KDaMIF%2BgOtXtCidlIrbFBp8Ay2KU%2Fd8CkJUvZQRiY9nbbZpANDG%2Bdn8KEVh45YsNvjDvky9InmxxrfqDmGIZUIwJcOiYS%2FGn%2BFymX%2BCWDpPe9yrDYtTwn23FiETTGjpOqB166g8yBbLOmCsC0Gi1lFDmRaksahpQkosLCjVvx6lmg%2F2Ek%2Bltn5V9ZLSmycUfzlPW4uG35o4me4op4XlWcpdrfeI2Am%2BcB93SKl4pysSeRTqKy3tGgYfTzSHrrV4qk3cwx2Lk3Snh6VVS3PbQ158YRjJzN0fOwpPiDiXH4RQomB46yQNcY1kz7IkeEjKZAUlsnAvKeX%2BVtdhTKzllyB%2FIHgIIHT6ovnBAGmENwR1AmFNH8Fa5hTUun58nsL6lX5YdxEGJ32dtlyxDUdT8dbfjeiaroNruzPxjpHl78Fpjm5JkUAyxFZi%2FaReFkLLmF2%2B3KyA4oXUp9nyvko5xUqvs4lxgjW4LUTE8972jUyIeGQGxJbASt9P1bYEN%2FAQcTgewemdaE98LiE%2FiKz%2B3UP4KWPz8t8NI%2FYZErqQBkFA%2Fw%2Fy%2By4l6Bz2HyXlI%2B%2FlIVAW4pwVyieiw4jyW9ZrB6CPHasILD88h4B4zRbHO0nVMgrhn3rm4y3%2Ftl7IijlJ4cNiIus7Jr%2FvkC1RYfJnlQOXXmglhv9IynRHfCWw0BPFL4tYvU3Khv0wqW5moupzRl1Umoj8GzByfBTgwZuqMLSu5c4GOrABT1kKypxFpftR6fJ7uAEem6BO9dPJoK1jKwh3XrcUPzZaaP5QcaNHfdUTKAq4uf6XfqI2rP5yYidm8PpFN%2FcMoYiymHUSU83LorqYnJDXdTH6Qt9RY1Q9x364FpOfVxy72QN384bcsoGsik5xVZvZC7ZWSn0ynQ520fMBKLAGLZ4IoTiiGDA9pUrr07XP68cjozh7WKFdTCjbEbCROALdloHTjVeO67Ku2VKUnSLRUi0%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U5WHHB5ER%2F20260410%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260410T203803Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=eee5672531f3fed37e3cf85f20b495ad0c5e3786fbec5bb423e73d5dfcb8536f 768w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/td>\n<\/tr>\n<tr>\n<td>12.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>\u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1268\" src=\"https:\/\/blogs.glowscotland.org.uk\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture6-2.png\" alt=\"\" width=\"929\" height=\"823\" srcset=\"https:\/\/blogs.glowscotland.org.uk\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture6-2.png 1092w, https:\/\/glow-prod-gc.s3.eu-west-1.amazonaws.com\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture6-2-300x266.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEGwaCWV1LXdlc3QtMSJIMEYCIQCwxCml9wzFamWbdzDVIsVVaUfPWayyVs6Xe4WEsVkVOAIhAP2MYRgxqjNTNPc%2BxHaYzFGhd80FKEBs4r6FvmyMX9yiKrgFCDUQBRoMMjczNTcwMTk1NDMzIgyT%2FhHZHwVkcGVzY%2BgqlQXiGFYafSHV0HRdGy3qQ2lndSsZ%2FDubySFPAWKxvFSAdWsLvI3iqNq2PIS29wOUQWWc3Bpw%2BOsgEd8HXu2V0UZ2%2FOJDj7JHjaXXzw4koqouf0ZKCMgAXGA8s2hAv9bXtzyZ4iQkJ4urSJLnqyAc8OVOwDd%2Fu9Aw4KDaMIF%2BgOtXtCidlIrbFBp8Ay2KU%2Fd8CkJUvZQRiY9nbbZpANDG%2Bdn8KEVh45YsNvjDvky9InmxxrfqDmGIZUIwJcOiYS%2FGn%2BFymX%2BCWDpPe9yrDYtTwn23FiETTGjpOqB166g8yBbLOmCsC0Gi1lFDmRaksahpQkosLCjVvx6lmg%2F2Ek%2Bltn5V9ZLSmycUfzlPW4uG35o4me4op4XlWcpdrfeI2Am%2BcB93SKl4pysSeRTqKy3tGgYfTzSHrrV4qk3cwx2Lk3Snh6VVS3PbQ158YRjJzN0fOwpPiDiXH4RQomB46yQNcY1kz7IkeEjKZAUlsnAvKeX%2BVtdhTKzllyB%2FIHgIIHT6ovnBAGmENwR1AmFNH8Fa5hTUun58nsL6lX5YdxEGJ32dtlyxDUdT8dbfjeiaroNruzPxjpHl78Fpjm5JkUAyxFZi%2FaReFkLLmF2%2B3KyA4oXUp9nyvko5xUqvs4lxgjW4LUTE8972jUyIeGQGxJbASt9P1bYEN%2FAQcTgewemdaE98LiE%2FiKz%2B3UP4KWPz8t8NI%2FYZErqQBkFA%2Fw%2Fy%2By4l6Bz2HyXlI%2B%2FlIVAW4pwVyieiw4jyW9ZrB6CPHasILD88h4B4zRbHO0nVMgrhn3rm4y3%2Ftl7IijlJ4cNiIus7Jr%2FvkC1RYfJnlQOXXmglhv9IynRHfCWw0BPFL4tYvU3Khv0wqW5moupzRl1Umoj8GzByfBTgwZuqMLSu5c4GOrABT1kKypxFpftR6fJ7uAEem6BO9dPJoK1jKwh3XrcUPzZaaP5QcaNHfdUTKAq4uf6XfqI2rP5yYidm8PpFN%2FcMoYiymHUSU83LorqYnJDXdTH6Qt9RY1Q9x364FpOfVxy72QN384bcsoGsik5xVZvZC7ZWSn0ynQ520fMBKLAGLZ4IoTiiGDA9pUrr07XP68cjozh7WKFdTCjbEbCROALdloHTjVeO67Ku2VKUnSLRUi0%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U5WHHB5ER%2F20260410%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260410T203803Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=ab673e89433a0c2fa66791897f7dd5f0fa1134ccb15513e90f341cf711a7aeac 300w, https:\/\/glow-prod-gc.s3.eu-west-1.amazonaws.com\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture6-2-768x680.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEGwaCWV1LXdlc3QtMSJIMEYCIQCwxCml9wzFamWbdzDVIsVVaUfPWayyVs6Xe4WEsVkVOAIhAP2MYRgxqjNTNPc%2BxHaYzFGhd80FKEBs4r6FvmyMX9yiKrgFCDUQBRoMMjczNTcwMTk1NDMzIgyT%2FhHZHwVkcGVzY%2BgqlQXiGFYafSHV0HRdGy3qQ2lndSsZ%2FDubySFPAWKxvFSAdWsLvI3iqNq2PIS29wOUQWWc3Bpw%2BOsgEd8HXu2V0UZ2%2FOJDj7JHjaXXzw4koqouf0ZKCMgAXGA8s2hAv9bXtzyZ4iQkJ4urSJLnqyAc8OVOwDd%2Fu9Aw4KDaMIF%2BgOtXtCidlIrbFBp8Ay2KU%2Fd8CkJUvZQRiY9nbbZpANDG%2Bdn8KEVh45YsNvjDvky9InmxxrfqDmGIZUIwJcOiYS%2FGn%2BFymX%2BCWDpPe9yrDYtTwn23FiETTGjpOqB166g8yBbLOmCsC0Gi1lFDmRaksahpQkosLCjVvx6lmg%2F2Ek%2Bltn5V9ZLSmycUfzlPW4uG35o4me4op4XlWcpdrfeI2Am%2BcB93SKl4pysSeRTqKy3tGgYfTzSHrrV4qk3cwx2Lk3Snh6VVS3PbQ158YRjJzN0fOwpPiDiXH4RQomB46yQNcY1kz7IkeEjKZAUlsnAvKeX%2BVtdhTKzllyB%2FIHgIIHT6ovnBAGmENwR1AmFNH8Fa5hTUun58nsL6lX5YdxEGJ32dtlyxDUdT8dbfjeiaroNruzPxjpHl78Fpjm5JkUAyxFZi%2FaReFkLLmF2%2B3KyA4oXUp9nyvko5xUqvs4lxgjW4LUTE8972jUyIeGQGxJbASt9P1bYEN%2FAQcTgewemdaE98LiE%2FiKz%2B3UP4KWPz8t8NI%2FYZErqQBkFA%2Fw%2Fy%2By4l6Bz2HyXlI%2B%2FlIVAW4pwVyieiw4jyW9ZrB6CPHasILD88h4B4zRbHO0nVMgrhn3rm4y3%2Ftl7IijlJ4cNiIus7Jr%2FvkC1RYfJnlQOXXmglhv9IynRHfCWw0BPFL4tYvU3Khv0wqW5moupzRl1Umoj8GzByfBTgwZuqMLSu5c4GOrABT1kKypxFpftR6fJ7uAEem6BO9dPJoK1jKwh3XrcUPzZaaP5QcaNHfdUTKAq4uf6XfqI2rP5yYidm8PpFN%2FcMoYiymHUSU83LorqYnJDXdTH6Qt9RY1Q9x364FpOfVxy72QN384bcsoGsik5xVZvZC7ZWSn0ynQ520fMBKLAGLZ4IoTiiGDA9pUrr07XP68cjozh7WKFdTCjbEbCROALdloHTjVeO67Ku2VKUnSLRUi0%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U5WHHB5ER%2F20260410%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260410T203803Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=9ed5c75b008d9eb0a1d515b9fc0a9ea2435c4ca5ae5c99c987aba14fd54b431d 768w, https:\/\/glow-prod-gc.s3.eu-west-1.amazonaws.com\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture6-2-1024x907.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEGwaCWV1LXdlc3QtMSJIMEYCIQCwxCml9wzFamWbdzDVIsVVaUfPWayyVs6Xe4WEsVkVOAIhAP2MYRgxqjNTNPc%2BxHaYzFGhd80FKEBs4r6FvmyMX9yiKrgFCDUQBRoMMjczNTcwMTk1NDMzIgyT%2FhHZHwVkcGVzY%2BgqlQXiGFYafSHV0HRdGy3qQ2lndSsZ%2FDubySFPAWKxvFSAdWsLvI3iqNq2PIS29wOUQWWc3Bpw%2BOsgEd8HXu2V0UZ2%2FOJDj7JHjaXXzw4koqouf0ZKCMgAXGA8s2hAv9bXtzyZ4iQkJ4urSJLnqyAc8OVOwDd%2Fu9Aw4KDaMIF%2BgOtXtCidlIrbFBp8Ay2KU%2Fd8CkJUvZQRiY9nbbZpANDG%2Bdn8KEVh45YsNvjDvky9InmxxrfqDmGIZUIwJcOiYS%2FGn%2BFymX%2BCWDpPe9yrDYtTwn23FiETTGjpOqB166g8yBbLOmCsC0Gi1lFDmRaksahpQkosLCjVvx6lmg%2F2Ek%2Bltn5V9ZLSmycUfzlPW4uG35o4me4op4XlWcpdrfeI2Am%2BcB93SKl4pysSeRTqKy3tGgYfTzSHrrV4qk3cwx2Lk3Snh6VVS3PbQ158YRjJzN0fOwpPiDiXH4RQomB46yQNcY1kz7IkeEjKZAUlsnAvKeX%2BVtdhTKzllyB%2FIHgIIHT6ovnBAGmENwR1AmFNH8Fa5hTUun58nsL6lX5YdxEGJ32dtlyxDUdT8dbfjeiaroNruzPxjpHl78Fpjm5JkUAyxFZi%2FaReFkLLmF2%2B3KyA4oXUp9nyvko5xUqvs4lxgjW4LUTE8972jUyIeGQGxJbASt9P1bYEN%2FAQcTgewemdaE98LiE%2FiKz%2B3UP4KWPz8t8NI%2FYZErqQBkFA%2Fw%2Fy%2By4l6Bz2HyXlI%2B%2FlIVAW4pwVyieiw4jyW9ZrB6CPHasILD88h4B4zRbHO0nVMgrhn3rm4y3%2Ftl7IijlJ4cNiIus7Jr%2FvkC1RYfJnlQOXXmglhv9IynRHfCWw0BPFL4tYvU3Khv0wqW5moupzRl1Umoj8GzByfBTgwZuqMLSu5c4GOrABT1kKypxFpftR6fJ7uAEem6BO9dPJoK1jKwh3XrcUPzZaaP5QcaNHfdUTKAq4uf6XfqI2rP5yYidm8PpFN%2FcMoYiymHUSU83LorqYnJDXdTH6Qt9RY1Q9x364FpOfVxy72QN384bcsoGsik5xVZvZC7ZWSn0ynQ520fMBKLAGLZ4IoTiiGDA9pUrr07XP68cjozh7WKFdTCjbEbCROALdloHTjVeO67Ku2VKUnSLRUi0%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U5WHHB5ER%2F20260410%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260410T203803Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=9d99d457a9954cc6fe2df469124d372c09352aadbf10328571911856c15c498d 1024w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/td>\n<\/tr>\n<tr>\n<td>\u00a013.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>\u00a0B<\/td>\n<\/tr>\n<tr>\n<td>\u00a014.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>\u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1328\" src=\"https:\/\/blogs.glowscotland.org.uk\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture1-6.png\" alt=\"\" width=\"870\" height=\"384\" srcset=\"https:\/\/glow-prod-gc.s3.eu-west-1.amazonaws.com\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture1-6-300x132.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEGwaCWV1LXdlc3QtMSJIMEYCIQCwxCml9wzFamWbdzDVIsVVaUfPWayyVs6Xe4WEsVkVOAIhAP2MYRgxqjNTNPc%2BxHaYzFGhd80FKEBs4r6FvmyMX9yiKrgFCDUQBRoMMjczNTcwMTk1NDMzIgyT%2FhHZHwVkcGVzY%2BgqlQXiGFYafSHV0HRdGy3qQ2lndSsZ%2FDubySFPAWKxvFSAdWsLvI3iqNq2PIS29wOUQWWc3Bpw%2BOsgEd8HXu2V0UZ2%2FOJDj7JHjaXXzw4koqouf0ZKCMgAXGA8s2hAv9bXtzyZ4iQkJ4urSJLnqyAc8OVOwDd%2Fu9Aw4KDaMIF%2BgOtXtCidlIrbFBp8Ay2KU%2Fd8CkJUvZQRiY9nbbZpANDG%2Bdn8KEVh45YsNvjDvky9InmxxrfqDmGIZUIwJcOiYS%2FGn%2BFymX%2BCWDpPe9yrDYtTwn23FiETTGjpOqB166g8yBbLOmCsC0Gi1lFDmRaksahpQkosLCjVvx6lmg%2F2Ek%2Bltn5V9ZLSmycUfzlPW4uG35o4me4op4XlWcpdrfeI2Am%2BcB93SKl4pysSeRTqKy3tGgYfTzSHrrV4qk3cwx2Lk3Snh6VVS3PbQ158YRjJzN0fOwpPiDiXH4RQomB46yQNcY1kz7IkeEjKZAUlsnAvKeX%2BVtdhTKzllyB%2FIHgIIHT6ovnBAGmENwR1AmFNH8Fa5hTUun58nsL6lX5YdxEGJ32dtlyxDUdT8dbfjeiaroNruzPxjpHl78Fpjm5JkUAyxFZi%2FaReFkLLmF2%2B3KyA4oXUp9nyvko5xUqvs4lxgjW4LUTE8972jUyIeGQGxJbASt9P1bYEN%2FAQcTgewemdaE98LiE%2FiKz%2B3UP4KWPz8t8NI%2FYZErqQBkFA%2Fw%2Fy%2By4l6Bz2HyXlI%2B%2FlIVAW4pwVyieiw4jyW9ZrB6CPHasILD88h4B4zRbHO0nVMgrhn3rm4y3%2Ftl7IijlJ4cNiIus7Jr%2FvkC1RYfJnlQOXXmglhv9IynRHfCWw0BPFL4tYvU3Khv0wqW5moupzRl1Umoj8GzByfBTgwZuqMLSu5c4GOrABT1kKypxFpftR6fJ7uAEem6BO9dPJoK1jKwh3XrcUPzZaaP5QcaNHfdUTKAq4uf6XfqI2rP5yYidm8PpFN%2FcMoYiymHUSU83LorqYnJDXdTH6Qt9RY1Q9x364FpOfVxy72QN384bcsoGsik5xVZvZC7ZWSn0ynQ520fMBKLAGLZ4IoTiiGDA9pUrr07XP68cjozh7WKFdTCjbEbCROALdloHTjVeO67Ku2VKUnSLRUi0%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U5WHHB5ER%2F20260410%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260410T203803Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=01429e9a031dfd3cd7b75161c1efad504d8bf8d4cd3fea6e533a682bca5a236a 300w, https:\/\/glow-prod-gc.s3.eu-west-1.amazonaws.com\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture1-6-768x338.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEGwaCWV1LXdlc3QtMSJIMEYCIQCwxCml9wzFamWbdzDVIsVVaUfPWayyVs6Xe4WEsVkVOAIhAP2MYRgxqjNTNPc%2BxHaYzFGhd80FKEBs4r6FvmyMX9yiKrgFCDUQBRoMMjczNTcwMTk1NDMzIgyT%2FhHZHwVkcGVzY%2BgqlQXiGFYafSHV0HRdGy3qQ2lndSsZ%2FDubySFPAWKxvFSAdWsLvI3iqNq2PIS29wOUQWWc3Bpw%2BOsgEd8HXu2V0UZ2%2FOJDj7JHjaXXzw4koqouf0ZKCMgAXGA8s2hAv9bXtzyZ4iQkJ4urSJLnqyAc8OVOwDd%2Fu9Aw4KDaMIF%2BgOtXtCidlIrbFBp8Ay2KU%2Fd8CkJUvZQRiY9nbbZpANDG%2Bdn8KEVh45YsNvjDvky9InmxxrfqDmGIZUIwJcOiYS%2FGn%2BFymX%2BCWDpPe9yrDYtTwn23FiETTGjpOqB166g8yBbLOmCsC0Gi1lFDmRaksahpQkosLCjVvx6lmg%2F2Ek%2Bltn5V9ZLSmycUfzlPW4uG35o4me4op4XlWcpdrfeI2Am%2BcB93SKl4pysSeRTqKy3tGgYfTzSHrrV4qk3cwx2Lk3Snh6VVS3PbQ158YRjJzN0fOwpPiDiXH4RQomB46yQNcY1kz7IkeEjKZAUlsnAvKeX%2BVtdhTKzllyB%2FIHgIIHT6ovnBAGmENwR1AmFNH8Fa5hTUun58nsL6lX5YdxEGJ32dtlyxDUdT8dbfjeiaroNruzPxjpHl78Fpjm5JkUAyxFZi%2FaReFkLLmF2%2B3KyA4oXUp9nyvko5xUqvs4lxgjW4LUTE8972jUyIeGQGxJbASt9P1bYEN%2FAQcTgewemdaE98LiE%2FiKz%2B3UP4KWPz8t8NI%2FYZErqQBkFA%2Fw%2Fy%2By4l6Bz2HyXlI%2B%2FlIVAW4pwVyieiw4jyW9ZrB6CPHasILD88h4B4zRbHO0nVMgrhn3rm4y3%2Ftl7IijlJ4cNiIus7Jr%2FvkC1RYfJnlQOXXmglhv9IynRHfCWw0BPFL4tYvU3Khv0wqW5moupzRl1Umoj8GzByfBTgwZuqMLSu5c4GOrABT1kKypxFpftR6fJ7uAEem6BO9dPJoK1jKwh3XrcUPzZaaP5QcaNHfdUTKAq4uf6XfqI2rP5yYidm8PpFN%2FcMoYiymHUSU83LorqYnJDXdTH6Qt9RY1Q9x364FpOfVxy72QN384bcsoGsik5xVZvZC7ZWSn0ynQ520fMBKLAGLZ4IoTiiGDA9pUrr07XP68cjozh7WKFdTCjbEbCROALdloHTjVeO67Ku2VKUnSLRUi0%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U5WHHB5ER%2F20260410%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260410T203803Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=5f05c1e8e6260bdac3bc0ebf444d7110bcc7a2b77c81b97c164a8b8e2f7a6673 768w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/td>\n<\/tr>\n<tr>\n<td>\u00a015.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>\u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1329\" src=\"https:\/\/blogs.glowscotland.org.uk\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture2-5.png\" alt=\"\" width=\"904\" height=\"438\" srcset=\"https:\/\/blogs.glowscotland.org.uk\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture2-5.png 999w, https:\/\/glow-prod-gc.s3.eu-west-1.amazonaws.com\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture2-5-300x145.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEGwaCWV1LXdlc3QtMSJIMEYCIQCwxCml9wzFamWbdzDVIsVVaUfPWayyVs6Xe4WEsVkVOAIhAP2MYRgxqjNTNPc%2BxHaYzFGhd80FKEBs4r6FvmyMX9yiKrgFCDUQBRoMMjczNTcwMTk1NDMzIgyT%2FhHZHwVkcGVzY%2BgqlQXiGFYafSHV0HRdGy3qQ2lndSsZ%2FDubySFPAWKxvFSAdWsLvI3iqNq2PIS29wOUQWWc3Bpw%2BOsgEd8HXu2V0UZ2%2FOJDj7JHjaXXzw4koqouf0ZKCMgAXGA8s2hAv9bXtzyZ4iQkJ4urSJLnqyAc8OVOwDd%2Fu9Aw4KDaMIF%2BgOtXtCidlIrbFBp8Ay2KU%2Fd8CkJUvZQRiY9nbbZpANDG%2Bdn8KEVh45YsNvjDvky9InmxxrfqDmGIZUIwJcOiYS%2FGn%2BFymX%2BCWDpPe9yrDYtTwn23FiETTGjpOqB166g8yBbLOmCsC0Gi1lFDmRaksahpQkosLCjVvx6lmg%2F2Ek%2Bltn5V9ZLSmycUfzlPW4uG35o4me4op4XlWcpdrfeI2Am%2BcB93SKl4pysSeRTqKy3tGgYfTzSHrrV4qk3cwx2Lk3Snh6VVS3PbQ158YRjJzN0fOwpPiDiXH4RQomB46yQNcY1kz7IkeEjKZAUlsnAvKeX%2BVtdhTKzllyB%2FIHgIIHT6ovnBAGmENwR1AmFNH8Fa5hTUun58nsL6lX5YdxEGJ32dtlyxDUdT8dbfjeiaroNruzPxjpHl78Fpjm5JkUAyxFZi%2FaReFkLLmF2%2B3KyA4oXUp9nyvko5xUqvs4lxgjW4LUTE8972jUyIeGQGxJbASt9P1bYEN%2FAQcTgewemdaE98LiE%2FiKz%2B3UP4KWPz8t8NI%2FYZErqQBkFA%2Fw%2Fy%2By4l6Bz2HyXlI%2B%2FlIVAW4pwVyieiw4jyW9ZrB6CPHasILD88h4B4zRbHO0nVMgrhn3rm4y3%2Ftl7IijlJ4cNiIus7Jr%2FvkC1RYfJnlQOXXmglhv9IynRHfCWw0BPFL4tYvU3Khv0wqW5moupzRl1Umoj8GzByfBTgwZuqMLSu5c4GOrABT1kKypxFpftR6fJ7uAEem6BO9dPJoK1jKwh3XrcUPzZaaP5QcaNHfdUTKAq4uf6XfqI2rP5yYidm8PpFN%2FcMoYiymHUSU83LorqYnJDXdTH6Qt9RY1Q9x364FpOfVxy72QN384bcsoGsik5xVZvZC7ZWSn0ynQ520fMBKLAGLZ4IoTiiGDA9pUrr07XP68cjozh7WKFdTCjbEbCROALdloHTjVeO67Ku2VKUnSLRUi0%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U5WHHB5ER%2F20260410%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260410T203803Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=328b5bf469f40b1481b2bffe4cc92b219a64df427ee97f96804a1d6ddfa6fc9a 300w, https:\/\/glow-prod-gc.s3.eu-west-1.amazonaws.com\/gc\/public\/hchemanswers\/uploads\/sites\/5342\/2019\/03\/Picture2-5-768x371.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEGwaCWV1LXdlc3QtMSJIMEYCIQCwxCml9wzFamWbdzDVIsVVaUfPWayyVs6Xe4WEsVkVOAIhAP2MYRgxqjNTNPc%2BxHaYzFGhd80FKEBs4r6FvmyMX9yiKrgFCDUQBRoMMjczNTcwMTk1NDMzIgyT%2FhHZHwVkcGVzY%2BgqlQXiGFYafSHV0HRdGy3qQ2lndSsZ%2FDubySFPAWKxvFSAdWsLvI3iqNq2PIS29wOUQWWc3Bpw%2BOsgEd8HXu2V0UZ2%2FOJDj7JHjaXXzw4koqouf0ZKCMgAXGA8s2hAv9bXtzyZ4iQkJ4urSJLnqyAc8OVOwDd%2Fu9Aw4KDaMIF%2BgOtXtCidlIrbFBp8Ay2KU%2Fd8CkJUvZQRiY9nbbZpANDG%2Bdn8KEVh45YsNvjDvky9InmxxrfqDmGIZUIwJcOiYS%2FGn%2BFymX%2BCWDpPe9yrDYtTwn23FiETTGjpOqB166g8yBbLOmCsC0Gi1lFDmRaksahpQkosLCjVvx6lmg%2F2Ek%2Bltn5V9ZLSmycUfzlPW4uG35o4me4op4XlWcpdrfeI2Am%2BcB93SKl4pysSeRTqKy3tGgYfTzSHrrV4qk3cwx2Lk3Snh6VVS3PbQ158YRjJzN0fOwpPiDiXH4RQomB46yQNcY1kz7IkeEjKZAUlsnAvKeX%2BVtdhTKzllyB%2FIHgIIHT6ovnBAGmENwR1AmFNH8Fa5hTUun58nsL6lX5YdxEGJ32dtlyxDUdT8dbfjeiaroNruzPxjpHl78Fpjm5JkUAyxFZi%2FaReFkLLmF2%2B3KyA4oXUp9nyvko5xUqvs4lxgjW4LUTE8972jUyIeGQGxJbASt9P1bYEN%2FAQcTgewemdaE98LiE%2FiKz%2B3UP4KWPz8t8NI%2FYZErqQBkFA%2Fw%2Fy%2By4l6Bz2HyXlI%2B%2FlIVAW4pwVyieiw4jyW9ZrB6CPHasILD88h4B4zRbHO0nVMgrhn3rm4y3%2Ftl7IijlJ4cNiIus7Jr%2FvkC1RYfJnlQOXXmglhv9IynRHfCWw0BPFL4tYvU3Khv0wqW5moupzRl1Umoj8GzByfBTgwZuqMLSu5c4GOrABT1kKypxFpftR6fJ7uAEem6BO9dPJoK1jKwh3XrcUPzZaaP5QcaNHfdUTKAq4uf6XfqI2rP5yYidm8PpFN%2FcMoYiymHUSU83LorqYnJDXdTH6Qt9RY1Q9x364FpOfVxy72QN384bcsoGsik5xVZvZC7ZWSn0ynQ520fMBKLAGLZ4IoTiiGDA9pUrr07XP68cjozh7WKFdTCjbEbCROALdloHTjVeO67Ku2VKUnSLRUi0%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U5WHHB5ER%2F20260410%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260410T203803Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=52c747ef075d65070af8f7581d207730ad99e6aa8d6dff72f2251498fa1fba9e 768w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px\" \/><\/td>\n<\/tr>\n<tr>\n<td>\u00a016.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>\u00a0Mean bond enthalpy is the average\u00a0<a href=\"https:\/\/www.thoughtco.com\/definition-of-enthalpy-change-605090\">enthalpy change<\/a>\u00a0when one\u00a0<a href=\"https:\/\/www.thoughtco.com\/mole-definition-in-chemistry-606377\">mole<\/a>\u00a0of\u00a0<a href=\"https:\/\/www.thoughtco.com\/definition-of-bonds-in-chemistry-604392\">bonds<\/a>\u00a0are broken.<\/td>\n<\/tr>\n<tr>\n<td>\u00a017.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>a)<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>\u00a0i)<\/td>\n<td>\u00a0\u00a0\u00a0Hydration<\/td>\n<\/tr>\n<tr>\n<td>\u00a0ii)<\/td>\n<td>\u00a0-45 kj mol<sup>-1<\/sup><\/td>\n<\/tr>\n<tr>\n<td>\u00a018.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>\u00a0-8 kj mol<sup>-1<\/sup><\/td>\n<\/tr>\n<tr>\n<td>\u00a019.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>\u00a0b)<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>\u00a0i)<\/td>\n<td>\u00a0Enthalpy of formation.<\/td>\n<\/tr>\n<tr>\n<td>\u00a0ii)<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>20.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>\u00a0a)<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>\u00a0b)<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>\u00a0c)<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; 1. B 2. \u00a0D 3. \u00a0A 4. \u00a0B 5. \u00a0B 6. \u00a0D 7. \u00a0C 8. \u00a0C 9. \u00a0A 10. \u00a0B &nbsp; &nbsp; 11. \u00a0 12. \u00a0 \u00a013. \u00a0B \u00a014. \u00a0 \u00a015. \u00a0 \u00a016. \u00a0Mean bond enthalpy is the average\u00a0enthalpy change\u00a0when one\u00a0mole\u00a0of\u00a0bonds\u00a0are broken. \u00a017. a) \u00a0i) \u00a0\u00a0\u00a0Hydration \u00a0ii) \u00a0-45 kj mol-1 \u00a018. \u00a0-8 kj mol-1 &hellip; <a href=\"https:\/\/blogs.glowscotland.org.uk\/gc\/hchemanswers\/marking-guide-unit-3g1-bond-enthalpy\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;MARKING GUIDE: Unit 3G1 \u2013 Bond Enthalpy&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1047","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hchemanswers\/wp-json\/wp\/v2\/pages\/1047","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hchemanswers\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hchemanswers\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hchemanswers\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hchemanswers\/wp-json\/wp\/v2\/comments?post=1047"}],"version-history":[{"count":16,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hchemanswers\/wp-json\/wp\/v2\/pages\/1047\/revisions"}],"predecessor-version":[{"id":1537,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hchemanswers\/wp-json\/wp\/v2\/pages\/1047\/revisions\/1537"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hchemanswers\/wp-json\/wp\/v2\/media?parent=1047"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}