The Gibbs free enetgy change is: AG = AH-TAS 0 Given equaton is'. AG -73.1 +42.8 %3D AG = -73.IJ + 42.8 TJ ド Compare equa h'ons O and 2 Then

Chemistry: An Atoms First Approach
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Chapter7: Chemical Energy
Section: Chapter Questions
Problem 15Q: The enthalpy change for the reaction CH4(g)+2O2(g)CO2(g)+2H2O(l) is 891 kJ for the reaction as...
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Can you please show how you compare equation 1 and equation 2? How did the change in enthalpy became -73.1 J and change in entropy became -42.8 J/K.

The Gibbs free eneigy change is :
AG = AH- TAS
%3D
Given equation is'.
AG
ー 731 +42.8 T
AG - -73.1 J + 42.8 TJ
ド
Compare equa h'ons O and 2 . Then
AH =-73-I I
As = - 42. 8J
%3D
AH value is negative · Tuis
means thet beat eneigy rel eased
in the Techon. 30 the product has lowet entralpy value than
the reactaut.
(2)
Transcribed Image Text:The Gibbs free eneigy change is : AG = AH- TAS %3D Given equation is'. AG ー 731 +42.8 T AG - -73.1 J + 42.8 TJ ド Compare equa h'ons O and 2 . Then AH =-73-I I As = - 42. 8J %3D AH value is negative · Tuis means thet beat eneigy rel eased in the Techon. 30 the product has lowet entralpy value than the reactaut. (2)
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