$4\mathrm{.}22.$ Methane is compressed in a steady$-$state adiabatic compressor $(87\%$ efficient$)$ to $0\mathrm{.}4$MPa. What is the required work per mole of methane in $kJ?$ If

the flow is to be $17\mathrm{.}5$kmo$\frac{l}{h},$ how much work must be furnished by the compressor $($in $kW?$ What is the rate of entropy generation $($in $k\frac{J}{K}\frac{?}{h}?($a$)$

the inlet is at $0\mathrm{.}1013$MPa and $-240F$; $($b$)$ the inlet is $0\mathrm{.}1013$MPa and $200K.$