A gas has a volume of $$3.4 \mathrm{~L}$$ at $$298 \mathrm{~K}$$. What is the final temperature if the volume of gas increases to $$6.8 \mathrm{~L}$$ ?

A balloon contains $$2.27 \mathrm{~L}$$ air and has a pressure of $$1.013 \times 10^5 \mathrm{~Nm}^{-2}$$. The balloon rises to a certain height and expands to volume of $$4540 \mathrm{~mL}$$. What is the final pressure of air in balloon?

The volume of a gas at $$0^{\circ} \mathrm{C}$$ is $$2 \mathrm{~dm}^3$$. What is its volume if temperature is decreased by $$272^{\circ} \mathrm{C}$$ ?

What is the value of critical temperature of water?