A designer tests two solid materials for use in a reusable warming insert. During each test, all the energy supplied is transferred to the material and the material remains solid.

Material	Mass in $kg\text{kg}$	Energy supplied in $J\text{J}$	Initial temperature in $∘C^\circ\text{C}$	Final temperature in $∘C^\circ\text{C}$
P	0.50	15 000	20	50
Q	0.30	18 000	20	60

Calculate the energy needed to raise the temperature of 1 kg of each material by $∘C1\ ^\circ\text{C}$ .

Equal masses of P and Q are heated to the same temperature. Energy is then transferred from each material to the surroundings at the same rate.

Explain which material will remain warm for longer.

A designer tests two solid materials for use in a reusable warming insert. During each test, all the energy supplied is transferred to the material and the material remains solid.

Material	Mass in $kg\text{kg}$	Energy supplied in $J\text{J}$	Initial temperature in $∘C^\circ\text{C}$	Final temperature in $∘C^\circ\text{C}$
P	0.50	15 000	20	50
Q	0.30	18 000	20	60

Calculate the energy needed to raise the temperature of 1 kg of each material by $∘C1\ ^\circ\text{C}$ .

Equal masses of P and Q are heated to the same temperature. Energy is then transferred from each material to the surroundings at the same rate.

Explain which material will remain warm for longer.

14.2 Specific heat capacity and latent heat

Question 22

Markscheme

14.2 Specific heat capacity and latent heat

Question 22

Markscheme

14.2 Specific heat capacity and latent heat

Question 22

14.2 Specific heat capacity and latent heat Questions

14.2 Specific heat capacity and latent heat

Question 22

14.2 Specific heat capacity and latent heat Questions