At 25$^\circ$C, 50 g of iron reacts with HCl to form FeCl₂. The evolved hydrogen gas expands against a constant pressure of 1 bar. The work done by the gas during this expansion is _________ J. (Round off to the Nearest Integer).

[Given : R = 8.314 J mol^$-$1 K^$-$1. Assume, hydrogen is an ideal gas] [Atomic mass of Fe is 55.85 u]