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what is entropy change for reaction 2H2(...

what is entropy change for reaction 2H2(g) + O2 (g) -----?2H2O(l). Standard entropies of H2(g) , O2(g) and H2O(l) are 126.6, 201.20,68.0 J/k mol respectively

A

`-318.4 JK^(-1)mol^(-1)`

B

`-219.3 JK^(-1)mol^(-1)`

C

`-111.12 JK^(-1)mol^(-1)`

D

`-432.21 JK^(-1)mol^(-1)`

Text Solution

Verified by Experts

`Delta S_("Reaction")=Sigma S_("Product")-Sigma S_("Reactants")`
`Delta S_("Reaction")=2xx S_(H_(2)O)-[2xxS_(H_(2))+S_(O_(2))]`
`Delta S_("Reaction")=2xx68-[2xx126.6+201.20]`
`Delta S_("Reaction")=-318.4 JK^(-1)mol^(-1)`
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