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Q.

For a particular reaction, ΔH0=-40 kJ and ΔS0=-200JK-1 mol-1 . The reaction is ___

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a

spontaneous at all temperatures

b

nonspontaneous at all temperatures

c

spontaneous at temperature below -73°C

d

spontaneous at temperature above  -73°C

answer is C.

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Detailed Solution

ΔG0=ΔH0-TΔS0  When ΔG0=0, T=ΔH0ΔS0=-40×103-200=200 K
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