Question

Which describes Dalton’s Law? 1. The volume occupied by a given weight if gas at constant temperature is inversely proportional to pressure. 2. The volume occupied by a given weight of gas at constant pressure is directly proportional to the absolute temperature. 3. The total pressure exerted by a mixture of gases is the sum of the pressures exerted by the individual gases in the mixture.

Answer 1

3. The total pressure exerted by a mixture of gases is the sum of the pressures exerted by the individual gases in the mixture.

Step-by-step explanation:

Which describes Dalton’s Law?

1. The volume occupied by a given weight if gas at constant temperature is inversely proportional to pressure. NO. This behavior is explained by Boyle's Law.

V ∝ 1/P

2. The volume occupied by a given weight of gas at constant pressure is directly proportional to the absolute temperature. NO. This behavior is explained by Charle's Law.

V ∝ T

3. The total pressure exerted by a mixture of gases is the sum of the pressures exerted by the individual gases in the mixture. YES. Dalton's Law states that in a mixture of non-reacting gases the total pressure is the sum of the partial pressures. As a consequence, the partial pressure of each gas is equal to the total pressure times the mole fraction of such gas.

Ptotal = Σ Pi

Pi = Ptotal . Xi