During a constant-pressure experiment

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

Problem

During a constant-pressure experiment, a student records the following data: • mass of water in the calorimeter:

100.0\pm0.1\,\text{g}

• temperature change:

5.40\pm0.10^{\circ}\text{C}

• amount of reactant consumed:

0.0250\pm0.0002\,\text{mol}

Assuming the specific heat capacity of water is

4.18\,\text{J}\,\text{g}^{-1}\,^{\circ}\text{C}^{-1}

, determine the value of

\Delta H_{\text{rxn}}

\text{kJ}\,\text{mol}^{-1}

along with its absolute uncertainty, reporting the final answer to the correct number of significant figures.