{"id":1552,"date":"2016-03-15T10:08:12","date_gmt":"2016-03-15T10:08:12","guid":{"rendered":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/?page_id=1552"},"modified":"2016-03-15T10:08:12","modified_gmt":"2016-03-15T10:08:12","slug":"exercise-1_2b-w9i-help-card","status":"publish","type":"page","link":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/exercise-1_2b-w9i-help-card\/","title":{"rendered":"Exercise 1_2B W9(i) Help Card"},"content":{"rendered":"\n\n\n
\"LO1_A10\"<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n\n\n\n
\"Picture27\"<\/a><\/td>\nEnthalpy is the term used in Chemistry for the chemical potential energy of a substance (there is a slight difference between the two measures, but for Higher this difference can be ignored). It is given the symbol H<\/strong>. <\/a>It is not possible to directly measure the enthalpy of a chemical, however during a chemical reaction, the enthalpy change can be measured in kilojoules (kJ). The enthalpy change<\/strong> is given the symbol \u0394H<\/strong>.<\/p>\n

 <\/p>\n

 <\/p>\n

The enthalpy change is calculated from the difference in enthalpy between the enthalpy of the products (Hp<\/sub><\/span><\/sub>) and the reactants (Hr<\/sub>)<\/span><\/sub>.<\/p>\n

\u0394H = Hp<\/sub> – Hr<\/sub><\/strong><\/h2>\n

The calculation is product minus reaction, which means that enthalpy changes can be positive or<\/strong><\/em> negative. If the enthalpy change for one mole<\/strong> of substance is calculated, then the enthalpy change is expressed in kJ.mol-1<\/sup><\/strong>. Enthalpy change can be calculated from the potential energy diagram.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"Picture7\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

  Enthalpy is the term used in Chemistry for the chemical potential energy of a substance (there is a slight difference between the two measures, but for Higher this difference can be ignored). It is given the symbol H. It is not possible to directly measure the enthalpy of a chemical, however during a chemical … Continue reading “Exercise 1_2B W9(i) Help Card”<\/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-1552","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/pages\/1552","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/comments?post=1552"}],"version-history":[{"count":1,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/pages\/1552\/revisions"}],"predecessor-version":[{"id":1553,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/pages\/1552\/revisions\/1553"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu1hwrk\/wp-json\/wp\/v2\/media?parent=1552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}