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For which of the reactions, Delta S is n...

For which of the reactions, `Delta S` is not positive : `I_2(s) rarr I_2(g)`, `CuO(s)+H_2(g) rarr Cu(s)+H_2 O(l)`, `2 O_3(g) rarr 3 O_2(~g)`, `CH_4(g)+2 O_2(g) rarr CO_2(g)+2 H_2 O(g)`

A

I_2(s) rarr I_2(g)'

B

CuO(s)+H_2(g) rarr Cu(s)+H_2 O(l)'

C

2 O_3(g) rarr 3 O_2(~g)'

D

CH_4(g)+2 O_2^2(g) rarr CO_2(underlineg)+2 H_2 O(g)'

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The correct Answer is:
B
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