Question 1

What is Dalton's Law?

Accepted Answer

Dalton's Law states that the total pressure of a gas mixture equals the sum of the partial pressures of each individual gas. Each gas behaves as if it alone occupies the entire volume.

Question 2

What is a partial pressure?

Accepted Answer

The partial pressure of a gas is the pressure it would exert if it alone occupied the container at the same temperature. It equals the mole fraction times the total pressure: P_i = x_i × P_total.

Question 3

What is a mole fraction?

Accepted Answer

The mole fraction (x) is the ratio of moles of one component to the total moles of all components. All mole fractions in a mixture sum to 1. x_i = n_i / n_total.

Question 4

Does Dalton's Law apply to real gases?

Accepted Answer

Dalton's Law works well for ideal gases and for real gases at low to moderate pressures. At very high pressures or for gases with strong intermolecular forces, deviations occur.

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