Question

The variation of internal energy V of an ideal gas with increase in pressure P is shown in Fig. Which of the following pressure vs volume graph is equivalent to graph shown in Fig.?

Answer 1

Correct option is (2)

From the given graph pressure is directly proportional to internal energy (U). We know internal energy is directly proportional temperature (i.e. U α T). Therefore

P α T

From Charle’s law P α T if volume remains constant. The given graph is equivalent to V = constant.