3. A 33.2-g titanium bicycle part is added to 75.0 g of water in a coffee-cup...

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3. A 33.2-g titanium bicycle part is added to 75.0 g of water in a coffee-cup calorimeter at 50.00°C, and the temperature drops to 49.30°C. What was the initial temperature (in °C) of the metal part (the specific heat of titanium is 0.228 J/g.°C)? [Answer: 20.28°C] 4. When gasoline burns in a car engine, the heat released causes the gaseous products CO2 and H₂O 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] 3. A 33.2-g titanium bicycle part is added to 75.0 g of water in a coffee-cup calorimeter at 50.00°C, and the temperature drops to 49.30°C. What was the initial temperature (in °C) of the metal part (the specific heat of titanium is 0.228 J/g.°C)? [Answer: 20.28°C] 4. When gasoline burns in a car engine, the heat released causes the gaseous products CO2 and H₂O 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]