An unknown gas has an unknown volume and an known temperature of 100 degrees Celsius.

Question

What was the initial volume if the new volume if 2.1 Land the temperature decreases to 30 degrees Celsius? Always convert temperature to Kelvin unless it is already in Kelvin: (Celsius us+273=Kelvin(K))

Answer 1

From the ideal gas law, P₁V₁ /P₂V₂ = T₁ /T₂. Apparently the pressure doesn't change, so V₁ = T₁V₂ /T₂ = (100 + 273) (2.1 L) / (30 + 273) = 2.6 L.