Question

3L of nitrogen gas is heated from 20°C to 80°C. What is the new volume of the gas, if pressure remains constant?

Answer 1

Answer:
The volume increases to 3.61 L.

Solution:
According to Charle's Law, " At constant pressure and mass the volume of gas is directly proportional to the applied temperature".

For initial and final states of a gas the equation is,

V₁ / T₁ = V₂ / T₂
Solving for V₂,
V₂ = V₁ T₂ / T₁ ----- (1)

Data Given;
V₁ = 3 L

T₁ = 20 °C + 273 = 293 K

T₂ = 80 °C + 273 = 353 K

Putting values in eq. 1,

V₂ = (3 L × 353 K) ÷ 293 K

V₂ = 3.61 L