How to Calculate Total Pressure of Mixture of Gases using Dalton's Law?
Daltons law states that the pressure exerted by the total gas mixture at a temperature in a fixed volume is equal to the sum of the partial pressures that is exerted by each of the gas in the mixture at the same volume. This step by step tutorial will help you to learn how to calculate the total pressure exerted by a mixture of gases.
Formula :Daltons Law of Partial Pressue
Pt = P1 + P2 + P3,.......Pn
Pt = Total Partial Pressure
P1, P2, P3, ...Pn = Partial Pressure of the Individual Gases.
Step 1: Consider a mixture of H2, O2 and N2, in a container of 3 L, at a temperature of 300 K, with partial pressure of 1220, 1000 and 865 kpa.
Partial Pressure of H2 = 1220 kPa
Partial Pressure of O2 = 1000 kPa
Partial Pressure of N2 = 865 kPa
Step 2: Applying the values in Daltons Law of Partial Pressure,
Pt = 1220 + 1000 + 865
= 3085 kPa
Hence, the total pressure exerted is 3085 kPa.