Heat Capacity Water and Air MCQ (Multiple Choice Questions) PDF Download

A person boils water from 75 °C, the water uses thermal energy of 10000 J, the heat capacity of water is

1. 200 J K^-1
2. −200 J K^-1
3. 400 J K^-1
4. −400 J K^-1

A person boils water of mass 150 kg from the temperature of 85 °C with the thermal energy of 22500 J, the specific heat capacity of the water is

1. 5 J kg^-1 °C^-1
2. 7.5 J kg^-1 °C^-1
3. 10 J kg^-1 °C^-1
4. 15 J kg^-1 °C^-1

A heater raises the temperature of air in a room from 22 °C to 37 °C with the energy of 7500 J. If the mass of the air is 5 kg, the specific heat capacity of the air would be

1. 25 J kg^-1 °C^-1
2. 50 J kg^-1 °C^-1
3. 75 J kg^-1 °C^-1
4. 100 J kg^-1 °C^-1

In a science lab, a student uses 150g of water and heats it from 10 °C to 30 °C with the energy of 10000 J, the heat capacity of the water is

1. 250 J K^-1
2. −250 J K^-1
3. 500 J K^-1
4. −500 J K^-1

A heater changes the temperature of room from 20 °C to 40 °C with the energy usage of 20000 J, the heat capacity of the air in the room would be

1. 500 J K^-1
2. 1000 J K^-1
3. 1200 J K^-1
4. 1500 J K^-1