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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Question
55. Using Hess's law and equations 1-3 below, find ΔH° at 25°C for the oxidation of C2H5OH(l). C2H5OH(l) + 3O2(g) → 3H2O(l) + 2CO2(g)
1. C2H4(g)+3O2(g)→2CO2(g)+2H2O(l) ΔH°=-1411kJ
2. C(graphite)+3H2(g)+(1/2)O2(g)→C2H5OH(l) ΔH°=-278kJ
3. C2H4(g)+H2O(l)→C2H5OH(l) ΔH°= -44kJ
A) 44 kJ
B) 632 kJ
C) -1367 kJ
D) -1742 kJ
E) none of these
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