Chemistry

Problem

Four reactions are performed in identical insulated beakers, each containing

100.0\,\text{g}

of water at

25\,^{\circ}\text{C}

. The measured molar enthalpies are: Reaction A:

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

Reaction B:

\Delta H = +23\,\text{kJ mol}^{-1}

Reaction C:

\Delta H = -12\,\text{kJ mol}^{-1}

Reaction D:

\Delta H = +87\,\text{kJ mol}^{-1}

Assuming equal amounts (in moles) of reactant are used in each case, identify which reaction will result in the largest temperature increase of the surrounding water.

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