1.

Delta_(f)U^(ө) for the formation of CH_(4)(g) at certain temperature is -393 kJ mol^(-1). The value of Delta_(f)H^(ө) is

Answer»

zero
`LT Delta_(f)U^(ө)`
`gtDelta_(f) U^(ө)`
EQUAL to `Delta_(f)U^(ө)`

Solution :`CH_(4)(g)+2O_(2)(g)toCO_(2)(g)+2H_(2)O(l)`
`Deltan_(g)=(n_(p)-n_(r))=1-3=-2`
`Delta_(f)H^(ө)=Delta_(f)U^(ө)+Deltan_(g)RT`
`Deltan_(g)=2Delta_(f)H^(ө) lt Delta_(f) U^(ө)`


Discussion

No Comment Found

Related InterviewSolutions