Enthalpy – Student Design


The purpose of this experiment is to determine the enthalpy change for the process

NH4Cl(s) + H2O(l) → NH4Cl(aq)


Because this is a planning experiment, there are fewer details and instructions.

It is very similar to Enthalpy – Displacement but you don’t need to plot a temperature/time graph because the maximum temperature change occurs very rapidly.


Make a list of requirements including the masses and amounts needed; show the list to your teacher or technician.


Work this out for yourself and keep and keep an accurate record.


  1. Tabulate your results in an appropriate form.
  2. Calculate the enthalpy change of solution for the thermochemical equation in the aim.


Compare your result with the accepted value of +16.4 kJ mol-1. Suggest reasons for any difference.