question_answer

Which of the following reaction can be used to define the heat of formation of \[C{{O}_{2}}(g)\] [MP PMT 1989; MH CET 2001]

A)                 \[C\text{(graphite)}+{{O}_{2}}(g)=C{{O}_{2}}(g)\]

B)                 \[C{{H}_{4}}(g)+2{{O}_{2}}(g)=C{{O}_{2}}(g)+2{{H}_{2}}O(l)\]

C)                 \[CO(g)+\frac{1}{2}{{O}_{2}}(g)=C{{O}_{2}}(g)\]

D)                 \[{{C}_{6}}{{H}_{6}}(l)+7\frac{1}{2}{{O}_{2}}(g)=6C{{O}_{2}}+3{{H}_{2}}O(l)\]