Question

The heat change for the following reaction:
$C\left(s\right)+2S\left(s\right)\to {CS}_2$ is known as:

• A. Heat of vaporization
• B. Heat of solution
• C. Heat of fusion
• D. Heat of formation

Answer 1

The correct option is D Heat of formation

Solution:- (D) Heat of formation

$C_{\left(s\right)}+2S_{\left(s\right)}⟶{C{S}_2}_{\left(l\right)}$

In the given reaction, $1$ mole of $C{S}_2$ is formed by its constituent elements, hence the heat change for the given reaction is known as heat of formation.