Saved Bookmarks
| 1. |
Calculate the enthalpy of formation of methane from the following data. C_((s))+O_(2_((g)))toCO_(2)(g)DeltaH^(@)=-393.5kJ…………..1 H_(2_((g)))+1/2O_(2(g))toH_(2)O_((l))DeltaH^(@)=-285.8kJ…………2 CH_(4_((g)))+2O_(2_((g))) rarr CO_(2)(g)+2H_(2)O_((l))DeltaH^(@)=-890kJ......................3 |
|
Answer» SOLUTION :required thermochemical equation is `C(S)+2H_(2)(g)toCH_(4)(g)DeltaH^((-))=?, C_((S))+2H_(2(g))toCH_(4(g))` Eqn 1 as it is `C_((s))+O_(2(g))toCO_(2(g))DeltaH^((-))=-393//5kJ` Eqn 2 `X^(2)` eqn Reverse Eqn 3 `2H_(2(g))+2/2O_(2)(g)to2H_(2((l)))DeltaH^((-))=571.6kJ` `CO_(2(g))+2H_(2)O_((l))toCH_(4(g))+2O_(2(g))=-57kJ` `DeltaH^((-1))=+890kJ` `C_((s))+2H_(2(g)toCH_(4(g))DeltaH^((-))=-75kJ` |
|