Analyse data for heat of combustion, heat of neutralisation and reactions in aqueous solutions to determine heat, mass, specific heat capacity, temperature and enthalpy change. Chem istry 2025 v1.3 Mole concept and law of conservation of mass

A student neutralises \(50.0\) mL of \(1.00\) mol L\(^{-1}\) hydrochloric acid with \(50.0\) mL of \(1.00\) mol L\(^{-1}\) sodium hydroxide solution in a polystyrene calorimeter. The initial temperature of both solutions is \(21.5\,^{\circ}\text{C}\) and the final temperature of the mixture is \(28.2\,^{\circ}\text{C}\). Assuming the density of the solution is \(1.00\) g mL\(^{-1}\) and the specific heat capacity is \(4.18\) J g\(^{-1}\,^{\circ}\text{C}^{-1}\), analyse the data to determine the heat released in this neutralisation reaction.

A student dissolves \(8.0\) g of anhydrous copper(II) sulfate (\(\text{CuSO}_4\)) in \(200.0\) mL of water in a polystyrene calorimeter. The temperature of the solution increases from \(21.5\,^\circ\text{C}\) to \(25.8\,^\circ\text{C}\). The density of the solution is \(1.00\,\text{g}\,\text{mL}^{-1}\) and its specific heat capacity is \(4.18\,\text{J}\,\text{g}^{-1}\,^\circ\text{C}^{-1}\). Analyse the data to determine the heat released in kilojoules (kJ) when \(8.0\) g of copper(II) sulfate dissolves.