1.

The heat capacity per mole of water is (R is universal gas constant)

Answer»

9R
6R
5R
5R

Solution :We treat water like a solid. For each atom average energy is `3k_(B)T`. Water molecule has THREE atoms, two hydrogen and ONE-oxygen. The total energy of one mole of water is
`U=3xx3k_(B)TxxN_(A)=9RT""[because k_(B)=(R)/(N_(A))]`
`THEREFORE` Heat capacity per mole of water is
`C=(DELTAQ)/(DeltaT)=(DeltaU)/(DeltaT)=9R`


Discussion

No Comment Found

Related InterviewSolutions