PROBLEM $6\mathrm{.}70$

Nitrogen $(N_2)$ enters a well$-$insulated diffuser cperating at steady state at $0\mathrm{.}656$ bar. $300$ K with a velecily of $282\frac{m}{s}.1$ he inlel area is $4\mathrm{.}5{10}^3{m}^2.$ At the diffuser exit. the pressurc is $0\mathrm{.}9$ bar exit temperature, in K $,$ and the exit area. in $m^2.$ For a control velume enclosing the diffuser, determine the rate of entropy production, in $k\frac{J}{K}$ per kg of nitogen flowing