Unit 2. Test: Energy Changes and Rates of Reaction. p. 4/7 Name: Application 3ection Galculations: Answer each question

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Unit 2 Test Energy Changes And Rates Of Reaction P 4 7 Name Application 3ection Galculations Answer Each Question 1 (35.46 KiB) Viewed 40 times

Unit 2. Test: Energy Changes and Rates of Reaction. p. 4/7 Name: Application 3ection Galculations: Answer each question in the space provided showing all calculation work Remember to incude the expression, all substitutions, appropriate signficant figures, relevant units, and a bax or circle around your final answer. (12 marks total; 3 marks each) 17. A 755 g water sample at 590∘C drops to 32.0∘C. How much energy was released by this water sample? Note: Show all calculations, units, significant figures, and box your answer. (3 marks) 18. The combustion of pentane is shown by the following equation: C4​Hu​(l)+BO−​(g)→5CO2​( g)+CH3​O(g) Use the following data and the summing method to find the heat of reaction for the above equation. (3) marks) C(9)+O(g)→CO2​(g)+393KJH2​(g)+HO2​(g)→H2​O(g)+242 kJSC(9)+CH2​(g)→C9​HS​(g)+147 kJ​