Questions:

1) Calculate the energy required to heat 250mL of water from 20°C to 80°C:

2) 400 mL of water at 22°C  was heated with 63.84 kJ of thermal energy. Calculate the final temperature of the water:

3) 500 g of a metal absorbed 7500 J of heat energy which raised the temperature from 20°C to 45°C. Find the specific heat of the metal:

4) A 100 g piece of metal with a specific heat capacity of 240 Jkg^–1K^–1 was heated with 4320 J of thermal energy. The metal was heated from 20°C to 150°C. How much energy was lost to the environment?