Q Joules of Heat is given to a sample of Helium in such a manner that the pressure remains constant throughout. The work done by the gas is then?

Question

(A) $\large\frac{Q}{5}$ (B) $\large\frac{2Q}{5}$ (C) $\large\frac{3Q}{5}$ (D) $\large\frac{5}{Q}$