$0\mathrm{.}5k\frac{g}{s}$ of air enters an insulated turbine at $1000K$ and it exits at $400K.$ The power, in $kW,$ produced by the turbine is:

a$.622\mathrm{.}53$

b$.522\mathrm{.}53$

c$.422\mathrm{.}53$

d$.322\mathrm{.}53$

e$.222\mathrm{.}53$