Pressure versus volume graph for a real gas and an ideal gas is shown in Fig. 5.4. Answer the following questions based on this graph.

(i) Interpret the behaviour of real gas with respect to an ideal gas at low pressure.

(ii) Interpret the behaviour of real gas with respect to an ideal gas at high pressure.

(iii)Mark the pressure and volume by drawing a line at the point where real gas behaves as an ideal gas.

Answers (1)

(i) Real gases show a very small deviation from ideal behaviour at low pressure because both the curves coincide with each other.

(ii) Real gases show large deviation at high pressure as the curves fall apart.

(iii)The point at which the curves intersect each other shows that the real gas behaves like an ideal gas.

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