Question

The enthalpy change for the reaction \(2\text{C(graphite) + 3\text{H}_2(g) \rightarrow \text{C}_2\text{H}_6(g)\) is called:}

• A. Enthalpy of combustion
• B. Enthalpy of formation
• C. Enthalpy of vaporization
• D. Enthalpy of sublimation

Hint:

Enthalpy of formation refers to formation of one mole of compound.

Answer 1

The Correct Option is B

The reaction forms one mole of ethane directly from its elements in standard states.