How to Calculate Charles's Law
What is Charles's Law?
Charles's Law states that at constant pressure, the volume of an ideal gas is directly proportional to its absolute temperature (in Kelvin). V₁/T₁ = V₂/T₂. Heating a gas at constant pressure makes it expand.
Step-by-Step Guide
- 1Always convert temperatures to Kelvin: K = °C + 273.15
- 2Record V1 and T1; identify desired T2
- 3V2 = V1 × T2 / T1
- 4Pressure must remain constant
Worked Examples
Input
V1=5L at T1=300K · heated to T2=450K
Result
V2 = 7.5L
5×450/300=7.5L
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