Physics

1Specific latent heat of vaporisation is the heat needed to

2During melting, the temperature of a pure solid

3How much heat is needed to raise 0.2 kg of a substance with c = 400 J kg⁻¹ K⁻¹ by 20 K?

4Water is used as a coolant in car radiators because it has

5The heat needed to warm 3 kg of water by 20 K (c = 4,200 J kg⁻¹ K⁻¹) is ___ J.

6Specific heat capacity is the heat needed to

7How much heat is needed to vaporise 2 kg of water at 100 °C? (L = 2.26 × 10⁶ J/kg)

8How much heat is needed to raise 2 kg of a substance with c = 400 J kg⁻¹ K⁻¹ by 25 K?

9How much heat is needed to melt 0.2 kg of ice at 0 °C? (L = 3.36 × 10⁵ J/kg)

10Water boils at a lower temperature on a high mountain.