Question

Estimate the difference between C_p and C_v for 10kg of water at 20℃ and at a pressure of 1 atm

Answer 1

The relation that correlates these two for gases is C_p = C_v + R.

But since liquids can practically assumed to be incompressible, C_p and C_v for them have almost same values and hence only a single value of specific heat is used for them.