When 1.017 g of pure sodium metal is added to 125.0 mL of distilled water, the temperature of the water changes from 18.6 °C to 30.2°C. Water is in excess. The reaction is: (5 marks)
Na (s) + H2O (l) → NaOH (aq) + ½ H2 (g) ΔH = ?
Calculate the molar enthalpy of sodium as is dissolves in water ( ΔHr) Show a complete, organized solution including all units and the final answer rounded to the correct number of significant digits.
Molar enthalpy of sodium=