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The following thermochemical reactions a...

The following thermochemical reactions are given :
`M+(1)/(2)O_(2)to MO+351.4 kJ " " X+(1)/(2)O_(2)to XO+90.8 kJ`
It follows that the heat of reaction for the following process `M+XO to MO +X` is given by

A

422.2kJ

B

268.7kJ

C

`-442.2kJ`

D

`260.6kJ`

Text Solution

Verified by Experts

The correct Answer is:
D
`M + (1)/(2) O_(2) rarr MO + 351.4kJ` ...(i)
`X + (1)/(2) O_(2) rarr XO + 90.8kJ` ....(ii)
Subtract (i) – (ii)
`M+ (1)/(2) O_(2) rarr MO + 351.4kJ`
`X + (1)/(2) O_(2) rarr XO + 90.8kJ`
`M + XO rarr MO + X 260.6kJ`
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