Astudent poured 50.0 ml of 1.25 mol/l nitric acid - hno3- into a polystyrene cup and recorded that the temperature was 23.5°c. she then added 50.0 ml of 1.25 mol/l potassium hydroxide-koh- and found the temperature rose to 32.4°c. i. write a chemical equation representing the neutralisation reaction of the two chemicals. 2 marks) ii. calculate the enthalpy of neutralisation, given that the specific heat of water is 4.18 j/goc and the density of the solutions was 1.00 g/ml. 4 marks] b) in a laboratory experiment, 2.20 g of propanone - c3hso- was burned completely in oxygen. the heat from this combustion was used to raise the temperature of 100g of water from 18.9°c to 96.3°c calculate the enthalpy of combustion of propanone in kj/mol.