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Which reaction has the most positive ent...

Which reaction has the most positive entropy change understandard conditions?

A

`H_(2)O(g) +CO(g) to H_(2)(g) +CO(g)`

B

`CaCO_(3)(s) to CaO(s) to +CO_(2)(g)`

C

`NH_(3)(g) to NH_(3)(aq)`

D

`C_(8)H_(18)(g) to C_(8)H_(18)(s)`

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The correct Answer is:
B
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