1.

The following thermochemical reactions are given \[M+\frac{1}{2}{{O}_{2}}\,\,\to \,\,MO+351.4\,kJ\] \[X+\frac{1}{2}{{O}_{2}}\,\,\to \,\,XO+90.8\,kJ\] It follows that the heat of reaction for the following process \[M+XO\] ⇌ \[MO+X\] is given by                 [AMU 2001]

A.                 422.2 kJ
B.                 268.7 kJ
C.                 ? 442.2 kJ            
D.                 260.6 kJ
Answer» E.


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