Question

A 20.0-L volume of methane gas is heated from 25°C to 70°C at constant pressure. What is the final volume of the gas?

Answer 1

According to Gay Lussac's law, the change in temperature at constant pressure is directly proportional to the volume. that is, V1 / V2 = T1 / T2

we must first transfer the temperature to the kelvin:

T₁ = 25+273= 298K

T₂ = 70+273= 343K

V₁ = 20 L

V₁ / V₂ = T₁ / T₂

20/X = 298/343;

X = 20 * 343 / 298 = 23L

ANSWER: 23 L