The resting of iron occurs as:  `4Fe(s) +3O_(2)(g) rarr 2Fe_(2)O_(3)(s)`  The entalpy of formation
Channel: Doubtnut
Date: 26/07/2020

The resting of iron occurs as:  `4Fe(s) +3O_(2)(g) rarr 2Fe_(2)O_(3)(s)`  The entalpy of formation of `Fe_(2)O_(3)(s) is -824.0 kJ mol^(-1)` and entropy change for the reaction is `+550 J K^(-1) mol^(-1)`. Calculate `Deta_(surr)S` and predict whether resuting of iron is spontaneous or not at `298 K`.  Given `Delta_(sys) H =- 553.0 J K^(-1) mol^(-1)`