Hess's Law is a useful way for chemists to predict the enthalpy change for a reaction. Use yourunderstanding of energy changes to explain how Hess's Law works. Use the following exampleas part of your explanation (but you don't have to solve it!).8.How can Hess's law be applied to determine the enthalpy change for the decomposition ofpotassium bicarbonate:2 KHCO, (9) –K,CO; (s)+ H,O () + CO2 (2)AH = -963 kJ(1) K (9) + ½ H, (e)Ce +0, (9)→ KHCO; (5)2 (g)AH = -1150 kJ(2) 2K (9) + C + 02 (e) → K,C03 (6)AH = -242 kJ(3) H2() + ½ O2()H,O (g)AH = -394 kJ(4) C (6)+02 (g)- CO2 (2)

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8. Hess's Law is a useful way for chemists to predict the enthalpy change for a reaction. Use your understanding of energy changes to explain how Hess's Law works. Use the following example as part of your explanation (but you don't have to solve it!). How can Hess's law be applied to determine the enthalpy change for the decomposition of potassium bicarbonate: 2 KHCO; () K,CO, () + H,O (+ CO2 ) AH = -963 kJ (1) K (0) + ½ Hz e+ Co)+0; (2) → KHCO; () AH = -1150 kJ (2) 2K ) + C + 0; ()→ K;CO, (3) AH = -242 kJ HO (e) (3) H2+ ½ 02→ AH = -394 kJ (4) C (6) +02 () → CO2 (8)

8. Hess's Law is a useful way for chemists to predict the enthalpy change for a reaction. Use your understanding of energy changes to explain how Hess's Law works. Use the following example as part of your explanation (but you don't have to solve it!). How can Hess's law be applied to determine the enthalpy change for the decomposition of potassium bicarbonate: 2 KHCO; () K,CO, () + H,O (+ CO2 ) AH = -963 kJ (1) K (0) + ½ Hz e+ Co)+0; (2) → KHCO; () AH = -1150 kJ (2) 2K ) + C + 0; ()→ K;CO, (3) AH = -242 kJ HO (e) (3) H2+ ½ 02→ AH = -394 kJ (4) C (6) +02 () → CO2 (8)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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