For the reaction

CHEMISTRY · Subjective · A Level · Chemistry · Amount of substance · Amount of substance

Problem

For the reaction

2\text{A}(g)+\text{B}(g)\rightarrow 3\text{C}(g)

, the enthalpy change is

\Delta H = -250\,\text{kJ}

for the reaction as written. A mixture contains

3.0\,\text{mol}

of A and

4.0\,\text{mol}

of B. Which reactant limits the amount of heat

q

that will be released when the reaction proceeds to completion?