3. A 33.2-g titanium bicycle part is added to 75.0 g of water in a coffee-cup calorimeter at 50.00C, and the temperature drops to 49.30C. What was the initial temperature (in C) of the metal part (the specific heat of titanium is 0.228 J/g.C)? [Answer: 20.28C] 4. When gasoline burns in a car engine, the heat released causes the gaseous products CO2 and HO to the expanding gases expand, which pushes the pistons outward. Excess heat is removed by the radiator. do 451 J of work on the pistons and the system releases 325 J to the surroundings as heat, calculate the AU in J and kcal. [Answer: -776 J; -0.185 kcal]