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:7
MISSED THIS? Read Section
19.8 (Pages 871-877); Watch IWE 19.6.
Liquid methanol burns in oxygen to form gaseous
carbon dioxide and gaseous water.
Substance H (kJ/mol) S° (J/(mol. K))
CH3OH (1)
-238.6
126.8
O2 (g)
0
CO₂(g)
-393.5
CO2(aq) -413.8
H₂O(g) -241.8
H₂O(1)
-187.8
205.2
213.8
117.6
188.8
70.0
Part D
Calculate AGxn at 25 °C.
Express your answer in kilojoules to three significant figures.
AGixn=
Submit
VE ΑΣΦ
VO
Request Answer
?
kJ

Transcribed Image Text:Gibbs free energy (G) is a measure of the
spontaneity of a chemical reaction. It is the
chemical potential for a reaction, and is minimized
at equilibrium. It is defined as
G=H-TS
where H is enthalpy, T is temperature, and S is
entropy.
The chemical reaction that causes iron to corrode
in air is given by
4Fe +302-2Fe2O3
in which at 298 K, AH = - 1684 kJ and
ASixn
- 543.7 J/K.
=
Part C
At what temperature Teq do the forward and reverse corrosion reactions occur in equilibrium?
Express your answer as an integer and include the appropriate units.
► View Available Hint(s)
Teq
=
Submit
14
μÅ
Value
Units
?
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