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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Transcribed Image Text:Sho
<CHE154 S20 Ch19 Sec8-10
Self Assessment 19.10 Enhanced-with Feedback
MISSED THIS? Read Section 19.9
O.
(Pages 878-880) ; Watch IWE 19.10 .
ti
The following reaction, AGxn =
9.4kJ at 25 °C.
op
IS

Transcribed Image Text:Feedback
6 of 15
Review I Constants I Periodic Table
Part A
Find AGrxn when PNO,
=0.103 atm and PNO = 8.0 atm at 25 °C.
3 NO2(g) + H20(1) → 2 HNO3(1) + NO(g)
-12.6 kJ
2.20 x 104 kJ
O 19.0 kJ
31.4 kJ
Expert Solution

Step 1
Since we know that
ΔGrxn = ΔG0rxn + RTln(K)
where R = gas constant = 8.314
and T = temperature in Kelvin = 25 + 273 = 298 K
K = equilibrium constant
ΔG0rxn in J = 9400 J
For the given reaction,
K = PNO / (PNO2 )3
Hence substituting the value we get
K = 8 / 0.1033 = 7321.13
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