# If 5.0 L of a gas is heated from 50°C to 80°C, what is the final volume?

We use Charles' Law: $V \propto T$.
So ${V}_{1} / {T}_{1} = {V}_{2} / {T}_{2}$
${V}_{2} = {V}_{1} / {T}_{1} \times {T}_{2}$ $=$ $\frac{5.0 \cdot L \times 353 \cdot K}{323 \cdot K}$ $\cong$ $5.5 \cdot L$