Delta_(f)U^(@) of formation of CII_(4)(g) at certain temperature is -393 kJ"mol"^(-1).The value of Delta_(f)H^(@) is

Delta_(f)U^(@) of formation of CII_(4)(g) at certain temperature is -3

1.	Delta_(f)U^(@) of formation of CII_(4)(g) at certain temperature is -393 kJ"mol"^(-1).The value of Delta_(f)H^(@) is
Answer» zero `lt Delta_(F)U^(@)` `gtDelta_(f)U^(@)` equal to `Delta_(f)U^(@)` Solution :`Delta_(f)H^(@) = Delta_(f)U^(@) + Delta_(g)RT` For the reaction, `C(s) + 2H_(2)(g) to CH_(4)(g)` `therefore Deltan_(g) = 1 -2 = -1` `therefore Delta_(f)H^(@) = Delta_(f)U^(@) - 1RT` or `Delta_(f)U^(@) = Delta_(f)H^(@) + RT` or `Delta_(f)H^(@) lt Delta_(f)U^(@)`.