Question

An ideal gas is initially at a thermodynamic temperature T and has a volume V. Its volume is increased by ΔV due to an increase in temperature ΔT, pressure remaining constant. Which of the following graphs shows how the quantity δ = ΔV/(VΔT) varies with temperature?

Answer 1

Correct Answer is: (c)

pV = nRT. At constant pressure, pΔV = nRΔT.

Dividing, ΔV/V = ΔV/T

or δ ΔV/VΔT = 1/T

or δ ∝ 1/T.