The enthalpy change for the following reaction is -483.6 kJ: 2H₂ (g) + O₂ (g) → 2H₂O (g)
Therefore,the enthalpy change for the following reaction is ________ kJ.
4H₂ (g) + 2O₂ (g) → 4H₂O (g)

Question

Quizplus · Accepted Answer

The enthalpy change for the second reaction can be obtained by multiplying the enthalpy change of the first reaction by 2 (as the coefficients for all the reactants and products in the second reaction are doubled). Therefore,

Enthalpy change for the second reaction = 2 × (-483.6 kJ)
= -967.2 kJ

Hence, the correct answer is B) -967.2.

The Enthalpy Change for the Following Reaction Is -483