he volume of a gas varies inversely as the pressure upon it. The volume of a gas is 1600 cm3 under a pressure of 4 kg/2. What will be its volume under a pressure of 20 kg/cm2?

Answer

320 cm³

Explanation

Firstly, find the constant of proportionality.

V ∝ 1/p

V = k/p Where V = volume, k = constant and p = pressure of the gas.

1600 = k/4

k = 1600 * 4

= 6,400

The equation will be,

V = 6,400/p

For p = 20 Kg/cm²,

V = 6,400/20

= 320 cm³