By introducing enthalpy h to replace each of the (u pv) terms of Eq. 4.13, we get Eq. 4.14. An even simpler algebraic form would result by replacing each of the (u pv V2 2 gz) terms by a single...

By introducing enthalpy h to replace each of the (u pv) terms of Eq. 4.13, we get Eq. 4.14. An even simpler algebraic form would result by replacing each of the (u pv V2 2

gz) terms by a single symbol, yet we have not done so. Why not?

Simplify the general forms of the mass and energy rate balances to describe the process of blowing up a balloon. List all of your modeling assumptions.