The enthaply at `298K` of the reaction `H_(2)O_(2)(l)rarr+(1)/(2)O_(2)(g)` is `-23.5Kcal mol^(-1)` and the enthaply of formation of `H_(2)O_(2)(l)` is `-44.8Kcal mol^(-1)` . The enthaply of formatiom of `H_(2)O(l)` isA. `-68.3Kcalmol^(-1)`B. `68.3Kcalmol^(-1)`C. `-91.8Kcalmol^(-1)`D. `91.8Kcalmol^(-1)`

The enthaply at `298K` of the reaction `H_(2)O_(2)(l)rarr+(1)/(2)O_(2)

1.	The enthaply at `298K` of the reaction `H_(2)O_(2)(l)rarr+(1)/(2)O_(2)(g)` is `-23.5Kcal mol^(-1)` and the enthaply of formation of `H_(2)O_(2)(l)` is `-44.8Kcal mol^(-1)` . The enthaply of formatiom of `H_(2)O(l)` isA. `-68.3Kcalmol^(-1)`B. `68.3Kcalmol^(-1)`C. `-91.8Kcalmol^(-1)`D. `91.8Kcalmol^(-1)`
Answer» Correct Answer - B `DeltaH_(reaction)=DeltaH_(f)^(@)(H_(2)O_(2))-DeltaH_(f)^(@)(H_(2)O_(2))` `-23.5=x-(-44.8)` or `x=-23.5-44.8=-68.3`

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