A monatomic ideal gas that is initially at $1.50\times10^5$ Pa and has a volume of $0.0800$ m³ is compressed adiabatically to a volume of $0.0400$ m³. What is the ratio of the final temperature of the gas to its initial temperature? Is the gas heated or cooled by this compression?

Two moles of an ideal gas are heated at constant pressure from $T = 27$°C to $T = 107$°C. Draw a $pV$-diagram for this process.

Two moles of an ideal gas are heated at constant pressure from $T=27$°C to $T=107$°C. Calculate the work done by the gas.