enthalpy of solutiuon
Enthalpy of Solution Aim: To determine the enthalpy of solution for Ammonium Nitrate (NH4NO3(s)) and Sodium Hydroxide (NaOH(s)). ... Calculate the enthalpy of solution for ammonium nitrate (NH4NO3(s)) only once using the average change in temperature. ... 167°C The above table is for the results of the enthalpy of solution for Sodium Hydroxide (NaOH(s)). ... 57°C The above table is for the results of the enthalpy of solution for Ammonium Nitrate (NH4NO3(s)) Analysis: n (NH4NO3(s)) = m MM m = ? ... f) Change in Enthalpy For Reactions: NaOH(s) + aq à Na+(aq) + OH-(aq) and NH4NO3(s) + aq à NH4+(aq) + NO3-(aq) NaOH(s) + aq à Na+(aq) + OH-(aq) DH = DT°C x m x Cp (water) 1000 x n DT°Cav = 17. ... f) the average enthalpy of solution for NaOH is -70 KJ. ... f) The average change in enthalpy of solution for NH4NO3 is +21 KJ. ... The average enthalpy of solution for the reaction between sodium hydroxide and water was -70 KJ. ... As this was an exothermic reaction the change in enthalpy is negative due to heat energy being given off to its surroundings, two of which being the thermometer and the water. The average enthalpy of solution for the reaction between ammonium nitrate and water was +21 KJ mol-1. As this was an endothermic reaction the change in enthalpy is positive due to heat energy being absorbed from its surroundings, such as the water and the reaction’s atmosphere in which it was being conducted. ... : the calorimeter and the second error was that the reaction is not instantaneous, where time is taken for the reactants to mix, meaning that the maximum temperature is not reached before the liquid returns to room temperature and with the endothermic reaction, some heat may have been gained from the atmosphere meaning that the result for the change in enthalpy will be less than expected.