Question

Calculate the amount of work done during isothermal expansion of a gas from a volume of 4 dm³ to 6 dm³ against a constant external pressure of 3 atmosphere?

Options

• - 607.8

• -60.8 J

• - 30.4 J

• - 6.0 J

Answer 1

- 607.8

Explanation:

V₁ = 4 dm³, V₂ = 6 dm³, P_ex = 3 atm

Now, W = - P_ex (V₂ - V₁) = - 3(6 - 4)

= - 6 L atm = - 6 × 101.3 J

W = - 607.8 J