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Consider the following reactions: (i) ...

Consider the following reactions:
(i) `H^(+)(aq)+OH^(-)(aq)rarrH_(2)O(l)` ,
`DeltaH=-X_(1)KJmol^(-1)`
(ii) `H_(2)(g)+(1)/(2)O_(2)(g)rarrH_(2)O(l),DeltaH=-X_(2)KJmol^(-1)`
(iii) `CO_(2)(g)+H_(2)(g)rarrCO(g)+H_(2)O(l)` ,
`DeltaH=-X_(3)KJmol^(-1)`
(iv) `C_(2)H_(2)(g)+(5)/(2)O_(2)(g)rarr2CO_(2)(g)+H_(2)O(l)` ,
`DeltaH=+X_(4)KJmol^(-1)`
Enthanlpy of formation of `H_(2)O(l)` is

A

`+X_(1) kJ mol^(-1)`

B

`+X_(2)kj mol^(-1)`

C

`+X_93) kJ mol^(-1)`

D

`+ X_(4) kJ mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
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