The variation of pressure with volume of the gas at different temperatures can be graphically represented as shown in figure. On the basis of this graph answer the following questions.

At a constant pressure, how will the volume of a gas change if the temperature is increased from 200 K to 400 K?

Explanation

In accordance to Charles law, volume of a gas is directly proportional to its temperature if pressure is kept constant. Thus, on increasing temperature, the volume of a gas will increase if pressure is kept constant. At constant p when the increase in the temperature is from 200 K to 400 K, the volume of the gas increases `V_(4) gt V_(2)`