Question

Property of compressibility of gases can be utilised in:
A. Making fuel as CNG
B. Making fuel as LPG
C. In hospitals in filling of oxygen cylinder
D. In burning coal

Answer 1

We should know what compressibility is. Compressibility of the gases is defined as the change in volume concerning the change in pressure at a constant temperature. CNG is compressed natural gas. LPG is liquefied petroleum gas.

Complete Answer :
We can compress a gas by applying pressure at constant temperature,this is known as the compressibility of the gas. The ease of compression depends upon the compressibility factor.
-If gas has a high compressibility factor means we can compress the gas easily so it can be converted into liquid.
-CNG is made by compressing the natural gas less than one percent of its volume, it is used as fuel in place of gasoline. In compressing the natural gas to form CNG, the compressibility property of gas is utilized.
-LPG is made by refining the natural gases in oil refineries. The natural gases compressed to liquefy. In compressing the natural gas to form LPG, the compressibility property of gas is utilized.
-An oxygen cylinder is a container made up of aluminium or metal alloys that are filled with compressed oxygen. Oxygen is compressed over a thousand pressures.
-In burning of coal oxygen is consumed. Here, the reactivity property of oxygen is used.
-So, the property of compressibility of gases can be utilized in making fuel like CNG, LPG, and in hospitals in filling oxygen cylinders.

Therefore, option (A) making fuel as CNG, (B) making fuel as LPG and (C) in hospitals in the filling of an oxygen cylinder, are correct.

Note: The compressibility factor is defined as the ratio of the volume of the real and ideal gas.
${\text{Z}}\,{\text{ = }}\,\dfrac{{{{\text{V}}_{{\text{real}}}}}}{{{{\text{V}}_{{\text{ideal}}}}}}$
The formula to calculate the compressibility factor is as follows:
${\text{Z}}\,{\text{ = }}\,\dfrac{{{\text{pV}}}}{{{\text{nRT}}}}$
Where, p is the pressure, V is the volume, n is the number of mole of gas, R is the gas constant, T is the temperature.
The temperature at which real gas behaves as ideal gas known as Boyle’s temperature. The Boyle’s temperature is, ${{\text{T}}_{\text{b}}}\,{\text{ = }}\,\dfrac{{\text{a}}}{{{\text{Rb}}}}$ . At Boyle’s temperature,${\text{Z = 1}}$.