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The heat capacity per mole of water is (...

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

A

9R

B

`9/2R`

C

6R

D

5R

Text Solution

Verified by Experts

The correct Answer is:
A
Water is treated like a solid. For each atom average energy `= 3k_BT`
The total energy of one mole of water = `DeltaU=3 xx 3k_B T xx N_A` [as water molecule has three atoms]
=9RT
`C=(DeltaQ)/(DeltaT)=(DeltaU)/(DeltaT)=9R`
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