A furnace has a stack $30\mathrm{.}5m$ high. The gases in the stack have $M=28\frac{g}{m}ol$ and $T=150C.$

If the pressures of the air and the gas in the stack are equal at the top of the stack, what is the

pressure difference at the bottom of the stack?

Pls solve with system scheme and using compressible fluid integral formula