For case $($b$),$ determine the change in specific entropy between the specified states, in Bt$($u$)/($l$)$b $*\backslash$deg R$.$

Case $($b$)$ ammonia, p$\_(1)=140$lb$($f$)/($i$)$n$.^(2),$T$\_(1)=160\backslash$deg F;T$\_(2)=-10\backslash$deg F$,$h$\_(2)=345$Bt$($u$)/($l$)$b$.$