In which of the following reactions heat liberated is known as standard heat of formation of `CO_(2)`?

Options

A. `2CO(g)+O_(2)(g)to2CO_(2)(g)+135.5kcal`
B. `C_(diamond)+O_(2)(g)to2CO_(2)(g)+94.5kcal`
C. `C_(graph ite)+O_(2)(g)toCO_(2)(g)+94.05kcal`
D. `CH_(4)(g)+2O_(2)(g)toCO_(2)+2H_(O)(l)+212.8kcal`

Answer

C

Explanation

In the standard state, the amount of heat evolved or absorbed when one mole of the compound is formed form its integral elements is known as the standard heat of formation ofa compound .
Thus ,carbon graphite is the standard state.
Therefore ,heat liberated is known as standard heat of formation of `CO_(2).`