1. Tardigrade
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  4. A heating curve has been plotted for a solid object as shown in the figure. If the mass of the object is 200 g, then latent heat of vaporization for the material of the object is (n/2) × 106 J / kg. If power supplied to the object is constant and equal to 1 kW, then find the value of n.

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Q. A heating curve has been plotted for a solid object as shown in the figure. If the mass of the object is $200\, g$, then latent heat of vaporization for the material of the object is $\frac{n}{2} \times 10^{6} J / kg$. If power supplied to the object is constant and equal to $1\, kW$, then find the value of $n$.Physics Question Image

Thermal Properties of Matter

Solution:

Heat used for evaporation $=900\, kJ$
Mass evaporated $=0.2\, kg$
$\therefore L_{v}=\frac{900 \times 10^{3}}{0.2} J / kg$