3. When a piece of unknown metal weighing 24.4 grams, and at a temperature of 119.3 °C, is placed in a calorimeter containing heat of of water at K and the specific heat of the calorimeter is 159 J/K, what is the specific heat of the metal. (0.186 J/gC°) 4. The standard molar enthalpy of combustion for propane is -2044 kilojoules. Cho +50 - 3 CO,+1 HO What is the standard enthalpy change for the combustion of 3.000 moles of propane? 3 CH + 15 Oz - 9 CO2 + 12 HO (-6132 kJ) 5. The molar enthalpy (or heat) of combustion of ethanol, a simple alcohol having the formula C₂H,OH, is -277.7 kJ/mole. How many kilojoules of heat will be released by the combustion of 9.22 grams of this liquid at constant pressure? (-55.6 kJ)