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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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
Transcribed Image Text:Using the conditions of spontaneity to deduce the signs of AH and AS
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy
AS.
Note: if you have not been given enough information to decide a sign, select the "unknown" option.
reaction
observations
conclusions
ΔΗ is
A
This reaction is endothermic and proceeds
faster at temperatures above 70. °C.
AS is
✓ (pick one)
positive
negative
unknown
B
This reaction is spontaneous except below
69. °C but proceeds at a slower rate below
92. °C.
ΔΗ is
\PICK O
AS is
(pick one)
ΔΗ is
(pick one)
C
The reaction is never spontaneous.
AS is
(pick one)
☑
000
18
Ar
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