The classical Bernoulli equation, below Eq. 15.2-5 we have emphasized that the mechanical energy balance and the total energy balance contain different information, since the first is a consequence of conservation of momentum, whereas the second is a consequence of conservation of energy. For the steady-state flow of a compressible fluid with zero transport properties, both balances lead to the classical Bernoulli equation. The derivation based on the equation of motion was given in Example 3.5-1. Make a similar derivation for the steady state energy equation, assuming zero transport properties, that is, for isentropic flow.