A change in pressure and volume of a gas without any change in its temperature is called an isothermal change. In such a change there is free exchange of heat between the gas and its surroundings. Two essential conditions for a perfect isothermal change are :
(i) Walls of the container must be perfectly conducting
(ii)The process of compression or expansion must be slow.
Read the above passege and answer the following questions:
(i) A gas atmospheric pressure is compressed isthermally to one third of its volume. What is the final pressure?
(ii) What values of life do you learn from this study?

Explanation

(i) The equation of isothermal changes is `PV=constant`. When `V` becomes `(1//3)`, `P` would become 3 times, i.e., 3 atmosphere.
(ii) In day to day life, temperature of gas is like the state of mind of a person. The study implies that you will be in a stable state of mind or you will be at peace, when you are free to interact with other people around you. When you are free to exchange views with them, you are ready to help them in time of need and you are ready to take their help when required, you will be more comfortable.