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Consider the following reactions: C(s)...

Consider the following reactions:
`C(s)+O_(2)(g)toCO_(2)(g)+x " kJ"`
`CO(g)+(1)/(2)O_(2)(g)toCO_(2)(g)+y" kJ"`
The heat formation of CO(g) is :

A

`-(x+y)` kJ/mol

B

`(x-y)` kJ/mol

C

`(y-x)` kJ/mol

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
`C(s)+O_(2)(g)rarrCO_(2)(g),`
`Delta_(r )H_(1)=-x" kJ"//"mol .....(1)"`
`CO(g)+1//2O_(2)(g)rarrCO_(2)(g)`
`Delta_(r ) H_(2)=-y " kJ"//"mol .....(2)"`
Equation (1) - (2)
`C(s)+(1)/(2)O_(2)(g)rarrCO(g)`
`Delta_(f)H=(y-x)" kJ"//"mol"`
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