Which of the following occurs when water vapor is added to a dry gas at a constant pressure?
I.The volume occupied by the gas mixture increases.
II.The relative humidity of the mixture increases.
III.The partial pressure of the original gas is reduced.

Question

Quizplus · Accepted Answer

When water vapor is added to a dry gas at constant pressure, the volume of the gas mixture increases to accommodate the added water vapor (I). The relative humidity increases because there is now water vapor present in the mixture, contributing to the moisture content (II). The partial pressure of the original gas is reduced because the total pressure is constant and the addition of water vapor takes up a portion of the total pressure, thereby reducing the partial pressure of the original gas (III).

Which of the Following Occurs When Water Vapor Is Added