When 3.2g of ammonium chloride is dissolved in 75g of water, the temperature of the solution decreases from 22.8 C to 20.1 C. What is the energy of dissolution of NH4Cl per mole?
Dissolving NH4Cl in H2O is an endothermic solution process. You measure how much it cools the solution by the temperature of the H2O. q = mass H2O x specific heat H2O x (Tfinal-Tinitial) The q you measure is for 3.2g/53.4g or q/0.0599 mol. You want to convert that to q/1 mol.
