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For the reaction : H(2)(g) + (1)/(2)O(...

For the reaction :
`H_(2)(g) + (1)/(2)O_(2)(g) rarr H_(2)O(l), Delta H = - 68 kcalmol^(-1)`
The heat change for the decomposition of 7.2 g of water is

A

`13.6 kcal`

B

`27.2 kcal`

C

`54.4 kcal`

D

`-34 kcal`

Text Solution

Verified by Experts

The correct Answer is:
B
Heat change for the decomposition of 1 mole or 18 g water = 68 kcal
Heat change for the decomposition of 7.2 g of water = `(68 xx 7.2)/(18) = 27.2 kcal`
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