Question

Find the mass of the ammonia in the 100 ft^3 3 tank having a pressure of 70 psi at 120

Answer 1

$V=100~ft^3=2.83~m^3,$

$p=70~psi=4.83\cdot 10^5~Pa,$

$T=70°F=294~K,$

$M=17\cdot10^{-3}~\frac{kg}{mol},$

$pV=\frac mM RT,\implies$

$m=\frac{pVM}{RT}=9.5~kg.$