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Based on the following thermochemical eq...

Based on the following thermochemical equations,
`H_2O(g)+C(s) rarr CO(g) +H_2, Delta H= 131 KJ`
`CO(g) = (1//2) O_2(g) rar CO_2(g), Delta H =-282 kJ`
`H_2(g) + (1//2 )O_2(g) rarr H_2O(g), Delta H=-242 kJ`
`C(s) + O_2(g) rarr CO_(2) , Delta H= X kJ` the value of X will be

A

`-393 kJ`

B

`-655 kJ`

C

`+393 kJ`

D

`+ 655 kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
Eqn.(i)-[Eqn.(ii)+Eqn.(iii)]gives
X=131-[-282-242]=-393KJ.
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