Question

gas occupies a volume of 250 ml at 700 mm HG pressure and 250 degree Celsius what additional pressure is required to reduce gas of volume to its 4/5th value at the same temperature​

Answer 1

Answer:-

Given:

Initial Pressure(P) = 700 mm Hg.

Initial Volume(V) = 250 ml.

Final Volume (V') = Initial Volume*4/5 = 4V/5.

We know that,

Boyle's law states that at constant temperature, the pressure of a gas is inversely proportional to its Volume.

$→ P \: \alpha \frac{1}{V}$

(or)

PV = K (Constant)

(or)

P*V = P' * V'

→ (700)(250) = P' (4V/5)

→ (700)(250)(5/4*250) = P'.

→ 875 = P'

Therefore, the Pressure needed is 875 mm Hg.