How many kilocalories of heat does an expenditure of 805 kJ produce?

How much heat in kcal must be added to 0.30 kg of water at room temperature (20C) to raise its temperature to 36C?

A cylinder of gas at room temperature (20C) has a pressure p₁. To what temperature in degrees Celsius would the temperature have to be increased for the pressure to be 1.2p₁?

If electrical energy were used, how much would this cost at 42 per kWh?

How much energy is necessary to heat 5.5 kg of water from room temperature (20C) to its boiling point? (Assume no energy loss.)

A fire breaks out and increases the Kelvin temperature of a cylinder of compressed gas by a factor of 2.3. What is the final pressure of the gas relative to its initial pressure?