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How many of the following processes have...

How many of the following processes have +ve sign for entropy change?
(i) `Cl_(2(g)) hArr 2Cl_((g))`
(ii) `S_(8)("rhombic") hArr 4S_(2(g))`
(iii) `3O_(2(g)) hArr 2O_(3(g))`
(iv) 60C (graphite ) `hArr C_(60(s))`
(v) `Ag_((aq))^(+) + Br_((aq))^(-) hArr AgBr_((s)) + H_(2)O`
(vi) `H_(2)O_((l)) hArr H_(2)O_((s))`
(vii) `2NH_(3(g)) hArr N_(2(g)) + 3H_(2(g))`
(viii) `CuSO_(4(g)) + 5H_(2)O_((l)) hArr CuSO_(4) .5H_(2)O_((s))`
(ix) `Ba(OH)_(2).10H_(2)O_((s)) + 2NH_(40Cl_((s))) hArr BaCl_(2(s)) + 2NH_(3(g)) + 12H_(2)O_((l))`

Text Solution

Verified by Experts

The correct Answer is:
5
(i) `Cl_(2(g)) rarr 2Cl_((g))`
(ii) `S_(8)` (rhombic) `rarr 4S_(2(g))`
(iii) 60C (graphite) `rarr C_(60(s))`
(vii) `2NH_(3(g)) rarr N_(2(g)) + 3H_(2(g))`
(ix) `Ba(OH)_(2). 10H_(2)O_((s)) + 2NH_(4)Cl_((s)) rarr Bacl_(2(s)) + 2NH_(3(g)) + 12H_(2)O_((l))`
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Knowledge Check

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