{"id":15,"date":"2014-10-21T09:36:39","date_gmt":"2014-10-21T09:36:39","guid":{"rendered":"http:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/enthalpy-of-solution\/"},"modified":"2014-10-21T09:46:22","modified_gmt":"2014-10-21T09:46:22","slug":"enthalpy-of-solution","status":"publish","type":"page","link":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/enthalpy-of-solution\/","title":{"rendered":"Enthalpy of Solution"},"content":{"rendered":"

1.<\/strong> When a substance is dissolved in 200 cm3<\/sup> of water, the temperature rose from 18 o<\/sup>C to 23 o<\/sup>C. What is the energy change for this reaction?<\/p>\n

2.<\/strong> When a substance was dissolved in 150 cm3<\/sup> of water, the temperature fell from 22.5 o<\/sup>C to 18.1o<\/sup>C. What was the energy change for this reaction?<\/p>\n

3.<\/strong> A substance dissolved in 500 cm3<\/sup> water and the temperature fell from 20.3 o<\/sup>C to 16.9o<\/sup>C. What was the energy change for this reaction?<\/p>\n

4.<\/strong> 0.01 moles of a substance was dissolved in 200 cm3<\/sup> of water and the temperature dropped form 19 o<\/sup>C to 17 o<\/sup>C. What is the enthalpy of solution of this substance?<\/p>\n

5.<\/strong> 0.025 moles of a salt dissolved in 400 cm3<\/sup> of water and the temperature of the solution rose from 20 o<\/sup>C to 25 o<\/sup>C. What is the enthalpy of solution of this salt?<\/p>\n

6.<\/strong> 0.05 moles of a compound dissolved in 500 cm3<\/sup> of water, causing the temperature of the water to fall from 21 o<\/sup>C to 19.3 o<\/sup>C. What is the enthalpy of solution of the compound?<\/p>\n

7.<\/strong> 5.3g of sodium carbonate (Na2<\/sub>CO3<\/sub>) was dissolved in 100 cm3<\/sup> of water. The temperature of the water rose from 20.5 o<\/sup>C to 25.3 o<\/sup>C. What is the enthalpy of solution of this compound?<\/p>\n

8.<\/strong> 14.92g of potassium chloride (KCl) dissolved in 250 cm3<\/sup> of water causing the temperature of the water to change form 20.5 o<\/sup>C to 18.9 o<\/sup>C. What is the enthalpy of solution of potassium chloride?<\/p>\n

9.<\/strong> 2.022g of potassium nitrate (KNO3<\/sub>) is dissolved in 100 cm3<\/sup> of water. The temperature of the water changed from 23.5 o<\/sup>C to 21.2 o<\/sup>C. What is the enthalpy of solution of potassium nitrate?<\/p>\n

10.<\/strong> 8g of ammonium nitrate (NH4<\/sub>NO3<\/sub>) is dissolved in 200 cm3<\/sup> of water causing the temperature to change from 17 o<\/sup>C to 14 o<\/sup>C. What is the enthalpy of solution of ammonium nitrate?<\/p>\n

11.<\/strong> 4g of sodium hydroxide (NaOH) dissolved in 250 cm3<\/sup> of water causing a temperature change from 19 o<\/sup>C to 23.3 o<\/sup>C. What is the enthalpy of solution of sodium hydroxide?<\/p>\n

12.<\/strong> When 11.9g of potassium bromide (KBr) was dissolved in 300 cm3<\/sup> of water the temperature changed from 24.8 o<\/sup>C to 21.2 o<\/sup>C. What was the enthalpy of solution?<\/p>\n

13.<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0 A student found that 1\u00b708kJ of energy was released <\/strong>when 1\u00b72 g of potassium hydroxide was dissolved completely in water.<\/p>\n

Calculate the enthalpy of solution of potassium hydroxide.<\/p>\n

14.<\/strong> Calculate the enthalpy change for each of the following experiments.<\/p>\n

(a) When 1 g of potassium carbonate dissolved in 10 cm3<\/sup> of water the temperature increased by 5.60<\/sup>C.<\/p>\n

(b) When 1 g of sodium nitrate dissolved in 10 cm3<\/sup> of water the temperature fell by 5.60<\/sup>C.<\/p>\n

15.<\/strong> From the results of question 14 calculate the enthalpy of solution<\/strong> for<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 a)\u00a0 potassium carbonate (14a)<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 b)\u00a0 sodium nitrate (14b)<\/p>\n

16.<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0 The enthalpy change when 1 mole of sodium carbonate dissolves in water is 24.6 kJ mol-1<\/sup>. Calculate the mass of sodium carbonate which would produce a temperature rise of 9.20<\/sup>C \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 when added to 25cm3<\/sup> of water.<\/p>\n

17.<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0 2g of sodium hydroxide, NaOH, is dissolved in 0.125 kg\u00a0 of water causing the temperature to rise from 19o<\/sup>C to 23o<\/sup>C. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Calculate the enthalpy of solution of sodium hydroxide.<\/p>\n

18.<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0 14.9g of potassium chloride, KCl, is dissolved in 200cm3<\/sup> of water causing the temperature to fall from 19.5o<\/sup>C to 15.5o<\/sup>C. Calculate the enthalpy of solution of potassium chloride.<\/p>\n","protected":false},"excerpt":{"rendered":"

1. When a substance is dissolved in 200 cm3 of water, the temperature rose from 18 oC to 23 oC. What is the energy change for this reaction? 2. When a substance was dissolved in 150 cm3 of water, the temperature fell from 22.5 oC to 18.1oC. What was the energy change for this reaction? … Continue reading “Enthalpy of Solution”<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-15","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/pages\/15","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/comments?post=15"}],"version-history":[{"count":1,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/pages\/15\/revisions"}],"predecessor-version":[{"id":36,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/pages\/15\/revisions\/36"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsechchemu3hwrk\/wp-json\/wp\/v2\/media?parent=15"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}