Physics 9702 · AS & A Level · Specific heat capacity and specific latent heat

Specific heat capacity and specific latent heat — practice question

(a)[2]

What does specific heat capacity mean?

(b)

Two solid blocks $X$ and $Y$ are made from different metals. They begin at different initial temperatures. Block $Y$ starts at room temperature. At time $t = 0$, the blocks are placed in direct thermal contact with one another. Fig. 2.1 shows how the temperatures of the two blocks vary with $t$.

(b(i))[3]

Give three conclusions that can be taken from Fig. 2.1. The conclusions may be qualitative or quantitative.

(b(ii))[3]

The ratio $\frac{\text{mass of block } Y}{\text{mass of block } X}$ equals $1.3$. The metal in block $Y$ has a specific heat capacity of $901\,\text{J kg}^{-1}\text{K}^{-1}$. Work out the specific heat capacity of the metal in block $X$.

(c(i))[3]

Give three conclusions that can be taken from Fig. 2.1. The conclusions may be qualitative or quantitative.

(c(ii))[3]

The ratio $\frac{\text{mass of block Y}}{\text{mass of block X}}$ equals $1.3$. The metal in block Y has a specific heat capacity of $901\,\text{J kg}^{-1}\text{K}^{-1}$. Work out the specific heat capacity of the metal in block X.

Worked solution & mark scheme

This 14-mark question has a full step-by-step worked solution and mark scheme. One marking point: Thermal energy required per unit mass to change temperature

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