Three separate trials are carried out at constant pressure

CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics

Problem

Three separate trials are carried out at constant pressure. Trial 1:

n = 0.50\;\text{mol}

\Delta H = -200\;\text{kJ mol}^{-1}

Trial 2:

n = 1.2\;\text{mol}

\Delta H = +150\;\text{kJ mol}^{-1}

Trial 3:

n = 0.80\;\text{mol}

\Delta H = -250\;\text{kJ mol}^{-1}

Rank the trials from the largest to the smallest magnitude of heat

q

exchanged with the surroundings. (List the trial numbers in order.)