question_answer

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