HEAT AND ENERGY NUMERICALS

Interactive Heat and Energy Numericals

Problem 1:

Calculate the heat required to raise the temperature of 5 kg of water (specific heat = 4184 J/kg°C) by 10°C.

Problem 2:

A metal block of mass 2 kg is heated from 20°C to 80°C. If the specific heat of the metal is 500 J/kg°C, calculate the heat absorbed.

Problem 3:

How much heat is lost when 3 kg of water at 100°C cools down to 50°C? (Specific heat of water = 4184 J/kg°C)

Problem 4:

A 10 kg block of ice at 0°C absorbs 334,000 J of heat. What is the final temperature if it completely melts? (Specific heat of water = 4184 J/kg°C)

Problem 5:

If 1500 J of energy is used to heat 0.5 kg of aluminum (specific heat = 897 J/kg°C), what is the temperature rise?

Problem 6:

Calculate the heat required to raise the temperature of 2 kg of copper (specific heat = 385 J/kg°C) from 25°C to 75°C.

Problem 7:

A 5 kg block of wood is heated from 10°C to 60°C. If the specific heat of wood is 1700 J/kg°C, how much heat is absorbed?

Problem 8:

How much heat is required to vaporize 1 kg of water at 100°C? (Latent heat of vaporization = 2260000 J/kg)

Problem 9:

A 4 kg iron object is heated from 20°C to 100°C. If the specific heat of iron is 450 J/kg°C, calculate the heat supplied.

Problem 10:

How much heat is released when 2 kg of steam at 100°C condenses to water at 100°C? (Latent heat of condensation = 2260000 J/kg)