Question

Two moles of an ideal gas is expanded isothermally and reversibly at 300 K from 1 L to 10 L. The enthalpy change in kJ is ______.

Options

• 11.4 kJ

• 4.8 kJ

• - 11.4 kJ

• 0 kJ

Answer 1

Two moles of an ideal gas is expanded isothermally and reversibly at 300 K from 1 L to 10 L. The enthalpy change in kJ is 0 kJ.

Explanation:

The enthalpy change at constant pressure is given as:

ΔH = C_p ΔT

For isothermal expansion

Δ T = 0

Δ H = 0