Question

If two gases with pressures of 2 atm and 3 atm are mixed at a constant temperature, what will the total pressure be?

A. (2 atm + 3 atm)/2
B. 2 atm x 3 atm
C. 3 atm – 2 atm
D. 2 atm + 3 atm

Answer 1

D. 2 atm + 3 atm

Step-by-step explanation:

Given:

Pressure Gas 1 = 2 atm

Pressure Gas 2 = 3 atm

Step-by-step explanation:

As per Dalton's Law in a mixture of gases, the total pressure is the sum of the partial pressures of the individual gases.

Ptotal = P1 + P2 + P3 + ...

where P1, P2,P3 are the partial pressures

Therefore for the given gas mixture, the total pressure would be:

Ptotal = 2 atm + 3 atm = 5 atm

Answer 2

If two gases with pressures of 2 atm and 3 atm are mixed at constant temperature, the total pressure will be the sum of the two pressures. Therefore the answer is D. 2 atm + 3 atm or 5 atm will be the total pressure of the gas mixture.