Question

what will be the volume of a gas when 3 litres of it is cooled down from 27 degree Celsius to minus seventy three degree Celsius at constant pressure?​

Answer 1

Given:

V₁ = 3 litre

T₁ = 27 °C

T₂ = - 73 °C

To find:

What will be the volume of a gas when 3 litres of it is cooled down from 27 degree Celsius to minus seventy three degree Celsius at constant pressure?

Solution:

From given, we have,

T₁ = 27 °C

T₁ = 27 + 273 = 300 K

T₂ = - 73 °C

T₂ = - 73 + 273 = 200 K

Using the Charle's law, we apply the formula,

V₁ / T₁ = V₂ / T₂

3 / 300 = V₂ / 200

V₂ = (3 × 200) / 300

∴ V₂ = 2 litre

Therefore, the volume of a gas when 3 litres of it is cooled down from 27 degree Celsius to minus seventy three degree Celsius at constant pressure is 2 litres.

Answer 2

Explanation:

apply Charles law

divide v1 by t1 and v2 by t2

v1/t1 = v2/t2

3/300 = v2/200

v2 = 2 litre