4. The molar enthalpy of solution Hm for NaOH(g, is 55.0kJ/mol. A chemist prepares 250.0mL of a 0.10 mol/L solution of NaOH(a)) By how much should the water temperature increase? [1.3C] 6. Predict the final temperature of 500g iron ring that is initially at 25.0C and is heated by combusting 4.95g of ethanol, C2H5OH. The molar enthalpy of combustion Hm for ethanol is 1234.8kJ/mol. (623C] 7. What mass of propane, C3H6. would have be combusted to increase the temperature of 300mL of water from 20.0C to its boiling point? The molar enthalpy of combustion, Hm of propane is 2219.2 kj/mol. [2.00g] 8. The equation below represents the burning of carbon disulfide, CS2() in a calorimeter. CS2(0)+3O2(0)CO2()+2SO2(0)+1690kJ What mass of CS2(1) must have burned to increase the temperature of 1.0kg of water by 15.5C [2.92g]