Chemistry

Problem

Four calorimetry trials are performed in identical calorimeters containing

100\;\text{g}

of water; heat losses to the surroundings are negligible. Trial A:

n = 0.60\;\text{mol}

\Delta H = -55\;\text{kJ mol}^{-1}

Trial B:

n = 0.40\;\text{mol}

\Delta H = +60\;\text{kJ mol}^{-1}

Trial C:

n = 1.2\;\text{mol}

\Delta H = -35\;\text{kJ mol}^{-1}

Trial D:

n = 0.70\;\text{mol}

\Delta H = +75\;\text{kJ mol}^{-1}

Arrange the trials in order from the one that will cause the greatest temperature increase of the water to the one that will cause the greatest temperature decrease. (List the trial letters in order.)

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