Question

Which of the following is an accurate mathematical expression of Dalton's law? Assume the variable ‘P' stands for pressure.

A. Ptotal = P1 + P2
B. Ptotal = P1 x P2
C. Ptotal = P1 ¸ P2
D. Ptotal = P1 + P2 x P3

Answer 1

Dalton's law of partial pressures states that the total pressure of a mixture of gases is the sum of the partial pressures of its components:
\text {P}_{\text{Total}} = \text P_{\text {gas 1}} + \text P_{\text {gas 2}} + \text P_{\text {gas 3}} ...P
​Total
​​ =P
​gas 1
​​ +P
​gas 2
​​ +P
​gas 3
​​ ...