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Question

For the reaction at 300K
A(g)+B(g)C(g)
ΔU=3.0kcal;ΔS=10.0cal/K
Value of ΔG is:

A
600cal
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B
6600cal
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C
6000cal
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D
none
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Solution

The correct option is A 600cal
ΔG=ΔHTΔS
ΔG=ΔU+RTΔnTΔS
T=300 K,Δn=1
ΔU=3000 cal,ΔS=10 cal
ΔG=3000+(2×300)(10)(300)
ΔG=600 cal
Option A is correct.

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