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If (i) C+ O(2) rarr CO(2), (ii) C +1//2O...

If (i) `C+ O_(2) rarr CO_(2)`, (ii) `C +1//2O_(2) rarr CO`, (iii) `CO+ 1//2O_(2) rarr CO`, the heats of reaction are `Q.-12, -10` respectively. Then Q=

A

`-2`

B

2

C

`-22`

D

`-16`

Text Solution

Verified by Experts

The correct Answer is:
C
`C+ O_(2) rarr CO_(2), Delta H= q`
`C + 1//2O_(2) rarr CO, Delta H= -12` ...(i)
`CO +1//2O_(2) rarr CO_(2), Delta H= -10` ...(ii)
adding equation (i) and (ii) we can get
`Delta H= -12 + (-10) = -22`
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