Calorimetry exercise 1

In an experiment to measure the enthalpy of solution of sodium carbonate-10-water, 8.324 g of Na₂CO₃.10H₂O was dissolved in 100 cm³ of distilled water in a plastic cup. There was a temperature change from 18.1 ºC to 13.9 ºC. Calculate the enthalpy change of solution. What errors occur in this experiment?

Specific heat capacity of water = 4.18 J g^-1 K^-1

Answer to exercise 1