A change in pressure and volume of a gas when no heat is allowed to enter into a escape from the gas is called an adiabatic change. Obviously, temperature of gas will change in adiabatic changes.
Two essential conditions for a perfect adiabatic chage are:
(a) the wall of the container must be perfectly non conducting.
(b) the process of compression or expansion must be sudden.
Read the above passage and answer the following questions:
(i) Pressure on a certain volume of air is doubled adiabatically. Will its volume become half, more than half or less than half? Justify.
(ii) What value of life do you learn from this study?

Explanation

(i) The equation of adiabatic changes is `PV^(gamma)= constant`, where `gamma= 1.4` for air. When `P` is doubled. `V^(gamma)` becomes `//2`. As `gamma=1.4`, therefore, `V` becomes more than half.
(ii) If temperature of a gas corresponds to the state of mind of a person, the study implies that when you isolate yourself from the society, neither giving help nor taking any help, you have to face the ups and downs of life (i.e., change in temperature). Your state of mind or peace of mind is at stake.