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Given, C(graphite)+O(2)(g)toCO(2)(g),Del...

Given, C(graphite)+`O_(2)(g)toCO_(2)(g),Delta_(r)H^(0)=-393.5kJ*mol^(-1)`
`H_(2)(g)+(1)/(2)(g)toH_(2)O(l),Delta_(r)H^(0)=-285.8kJ*mol^(-1)`
`CO_(2)(g)+2H_(2)O(l)toCH_(4)(g)+2O_(2)(g),Delta_(r)DeltaH^(0)=+890.3kJ*mol^(-1)`
Based on the above thermochemical equations, the value of `Delta_(r)H^(0)` at 298K for the reaction,
C(graphite)`+2H_(2)(g)toCH_(4)(g)`, will be-

A

`-74.8kJ*mol^(-1)`

B

`-144.0kJ*mol^(-1)`

C

`+74.8kJ*mol^(-1)`

D

`+144.0kJ*mol^(-1)`

Text Solution

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The correct Answer is:
A
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CHHAYA PUBLICATION-CHEMICAL THERMODYNAMICS-ENTRANCE QUESTION BANK
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