H and E  for the reaction, Fe O s 3H g 2Fe s H O l → at constant temperature are related as (a) H E (b) H E RT (c) H E RT (d) H E 3RT

For any chemical reaction, g H E n RT Where, g n total number of moles of gaseous products – total number of moles of gaseous reactants For the given reaction, 2 2 2 2 Fe O s 3H g 2Fe s H O l → g n 0 3 3 H E 3 RT H E 3RT State/Phase Change of Reactants and Products