InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
In certan areas where coal is cheap, artificial gas is produced for household use by the 'water gas' raction `C(s) +H_(2)O(g) underset(600^(@)C)rarr H_(2)(g) +CO(g)` Assuming that coke is `100%` carbon, calculate the maximum heat obtainable at `298K` from the combustion of `1kg` of coke, and compare this value to the maximum heat obtainable at `298K` from burning the water was produced from `1.00 kg` of coke. GIven: `Delta_(f)H^(Theta), H_(2)O(l) =- 68.32 kcal//mol` `Delta_(f)H^(Theta),CO_(2) (g) =- 94.05 kcal//mol` `Delta_(f)H^(Theta),CO(g) =- 26.42 kcal//mol` |
|
Answer» `C(s) +O_(2)(g) rarr CO_(2)(g), DeltaH =- 94.05 kcal mol^(-1)` Maximum heat obtainable form the combustion of `1.0 kf of coke =- (94.05)/(12) xx 1000 =- 7840 cal` Moles of carbon in `1kg` of coke `= (1000)/(12) = 83.3` Maximum heat obtainable from burning the water gas produced from `1kg` of coke `= (83.3) [(-68.32) +(67.6)]` `=- 11320.47 kcal` More energy is obtainable from water gas. |
|