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For a spontaneous process at all conditions of temperature which of the following is true?

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a
ΔS positive and ΔH positive 
b
ΔS positive and ΔH negative 
c
ΔS negative and ΔH positive 
d
ΔS negative and ΔH negative 

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detailed solution

Correct option is B

For a spontaneous process ΔG is negative. Since ΔG=ΔHTΔS

ΔG will always be negative if and only if ΔH is negative and ΔS is positive

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