Specific heat capacity and latent heat

Question 1 of 10

The temperature of boiling water stays at 100 °C while it boils at standard pressure.

Question 2 of 10

A metal block of mass 0.25 kg at 100 °C is dropped into 0.4 kg of water at 20 °C in a container of negligible heat capacity. The final temperature of the mixture is 24.5 °C. (Specific heat capacity of water = 4,200 J kg⁻¹ K⁻¹) (a) State the principle used. (b) Calculate the heat gained by the water. (c) Calculate the specific heat capacity of the metal. (d) State two precautions in this experiment.

Question 3 of 10

A metal block of mass 0.1 kg at 100 °C is dropped into 0.3 kg of water at 20 °C in a container of negligible heat capacity. The final temperature of the mixture is 22.5 °C. (Specific heat capacity of water = 4,200 J kg⁻¹ K⁻¹) (a) State the principle used. (b) Calculate the heat gained by the water. (c) Calculate the specific heat capacity of the metal. (d) State two precautions in this experiment.

Question 4 of 10

How much heat is needed to vaporise 2 kg of water at 100 °C? (L = 2.26 × 10⁶ J/kg)

Question 5 of 10

How much heat is needed to raise 0.5 kg of a substance with c = 400 J kg⁻¹ K⁻¹ by 25 K?

Question 6 of 10

How much heat is needed to raise 0.2 kg of a substance with c = 900 J kg⁻¹ K⁻¹ by 20 K?

Question 7 of 10

The heat needed to warm 2 kg of water by 10 K (c = 4,200 J kg⁻¹ K⁻¹) is ___ J.

Question 8 of 10

The heat needed to warm 1 kg of water by 5 K (c = 4,200 J kg⁻¹ K⁻¹) is ___ J.

Question 9 of 10

How much heat is needed to raise 0.2 kg of a substance with c = 400 J kg⁻¹ K⁻¹ by 20 K?

Question 10 of 10

Specific latent heat of vaporisation is the heat needed to