Chemical Thermodynamics Part 1

At 25∘C,50g 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=8.314Jmol−1K−1. Assume, hydrogen is an ideal gas]
[Atomic mass off Fe is 55.85u ]