A second student completed an experiment to determine the enthalpy of neutralisation…

CHEMISTRY · Multi-part · A Level · Chemistry · Energetics · Energetics

Problem

A second student completed an experiment to determine the enthalpy of neutralisation for the reaction between ethanedioic acid solution (

\text{HOOC-COOH}

) and potassium hydroxide solution. The student added

25 \text{ cm}^3

0.80 \text{ mol dm}^{-3}

ethanedioic acid solution to

75 \text{ cm}^3

0.60 \text{ mol dm}^{-3}

potassium hydroxide solution. The temperature increased by

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

. Assume that the specific heat capacity of the reaction mixture is

4.2 \text{ J K}^{-1} \text{ g}^{-1}

. Assume the density of the reaction mixture is

1.00 \text{ g cm}^{-3}

. (1) Give an equation for the reaction between ethanedioic acid solution and potassium hydroxide solution. (2) Calculate the enthalpy change (

\Delta H

) per mole of water formed in this reaction.