EXERCISES

In what way is the anomalous behaviour of water advantageous to aquatics animals?

Explain conduction, convection and radiation with examples?

State Boyle's law and Charles' law. Hence, derive ideal gas equation. Which of the two laws is better for the purpose of thermometry and why?

Explain thermal conductivity and the coefficient of thermal conductivity. A copper bar of thermal conductivity $401 \mathrm{W}{\left(\mathrm{mK}\right)}^{-1}$ has one end at $104 °\mathrm{C}$ and the other end at $24 °\mathrm{C}$. The length of the bar is $0.10 \mathrm{m}$ and the cross-sectional area is $1.0\times {10}^{-6} {\mathrm{m}}^2$. What is the rate of heat conduction along the bar?

State and explain Newton's law of cooling. States the conditions under which Newtons law of cooling is applicable. A body cools down from $60°C \mathrm{to} 50°C \mathrm{in} 5\min$ and to $40°C$ in another $8 \mathrm{minute}$. Find the temperature of the surroundings.

The mass of a litre of a gas is $1.562 \mathrm{g} \mathrm{at} 0°C$ under a pressure $76 \mathrm{cm} \mathrm{of} \mathrm{mercury}$. The temperature is increased to $250°C$ and the pressure $78 \mathrm{cm} \mathrm{of} \mathrm{mercury}$.  What is the mass of the one litre of the gas under new conditions?

The volume of a mass of gas at $37°C$ and pressure of $75 \mathrm{cm} \mathrm{of} \mathrm{mercury}$ is $620\mathrm{cc}$. Find the volume at N.T.P.

How much steam at $100°C$ is to be passes into water of mass $100\mathrm{g}$ at $20°C$ to raise its temperature by $5°C.$ (Latent heat of steam is $540\mathrm{cal}/\mathrm{g}$ And specific heat of water is $1\mathrm{cal}/\mathrm{g} °\mathrm{C}$)