3. Use Hess' law to calculate AH° for the reaction +2 H, 2(g) > C,He) from the combustion data: AH° = -1300 kJ C,H2(e) + 5/2 O2e) 2 CO+ H,O 2(g) 2(g) > H,O AH° = -286 kJ Ho + 1/2 0, 2(g) 2(g) > 2 CO,+3 H,O AH° = -1560 kJ %3D C,H+7/2 O,21e) 2(g) (1) ΔΗ - kJ

3. Use Hess' law to calculate AH° for the reaction +2 H, 2(g) > C,He) from the combustion data: AH° = -1300 kJ C,H2(e) + 5/2 O2e) 2 CO+ H,O 2(g) 2(g) > H,O AH° = -286 kJ Ho + 1/2 0, 2(g) 2(g) > 2 CO,+3 H,O AH° = -1560 kJ %3D C,H+7/2 O,21e) 2(g) (1) ΔΗ - kJ

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

Chapter6: Thermochemistry

Section: Chapter Questions

Problem 68E: In a coffee-cup calorimeter, 1.60 g NH4NO3 is mixed with 75.0 g water at an initial temperature of...

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Question

Use hess' law to calculate the change in H for the reaction:

3. Use Hess' law to calculate AH° for the reaction
+2 H,
2(g)
> C,He)
from the combustion data:
AH° = -1300 kJ
C,H2(e)
+ 5/2 O2e)
2 CO+ H,O
2(g)
2(g)
>
H,O
AH° = -286 kJ
Ho + 1/2 0,
2(g)
2(g)
> 2 CO,+3 H,O
AH° = -1560 kJ
%3D
C,H+7/2 O,21e)
2(g)
(1)
ΔΗ -
kJ

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