The salt ammonium perchlorate dissolves in water according to the reaction: NH4ClO4(s) → NH4+(aq) + ClO4-(aq)
(a) Calculate the standard enthalpy change ΔH° for this reaction, using the following data: NH4ClO4(s) = -295.3 kJ mol-1, NH4+(aq) = -132.5 kJ mol-1, ClO4-(aq) = -129.3 kJ mol-1.
(b) Calculate the temperature reached by the solution formed when 33.9 g of NH4ClO4 is dissolved in 0.196 L of water at 23.4 °C. Approximate the heat capacity of the solution by the heat capacity of 196 g of pure water (specific heat capacity = 4.18 J g-1 °C-1), ignoring the mass of the salt.