An 240 mL sample of oxygen at 90.00C and was cooled at constant pressure until it has a volume of 450.0 mL. What was the final celsius temperature of this gas?

Answer 1

Charles Law application here where we are analyzing volume and temperature of a gas after changing one of those variables.

V₁ = 240 mL

T₁ = 90 degrees C, but we must convert that to K, so it's 363K

V₂ = 450 mL

T₂ is what we are solving for

V₁/T₁ = V₂/T₂

Rearranging for T₂ = (T₁ x V₂) / V₁

Solving for T₂ gives you 680.6, but remember this is in Kelvin. You must subtract 273 from this value to convert it back to Celsius since that is what the question asked for. Final T would be 407.6 degrees Celsius.