## Chemistry: The Molecular Science (5th Edition)

$P_{1}= 3.05\,atm$ $T_{1}= (40.+273)K=313\,K$ $T_{2}= (-5.0+273)K=268\,K$ According to Gay Lussac's law, if n and V are constant: $\frac{P_{1}}{T_{1}}=\frac{P_{2}}{T_{2}}$ $\implies P_{2}=\frac{P_{1}T_{2}}{T_{1}}=\frac{3.05\,atm\times 268\,K}{313\,K}$ $=2.61\,atm$