A person breathes 2.6 L of air at - 11 C into her lungs, where it is warmed to 37 C. What is its new Volume?

3.076 L.

Explanation:

The pressure is constant as it is the atmospheric pressure. According to Charles' law; at constant pressure, the volume of a given quantity of a gas varies directly with its temperature.

∴ V₁T₂ = V₂T₁.

V₁ = 2.6 L & T₁ = - 11 °C + 273 = 262 K.

V₂ = ? L & T₂ = 37 °C + 273 = 310 K.

∴ V₂ = (V₁T₂) / T₁ = (2.6 L) (310 K) / (262 K) = 3.076 L.