Consider the following gases, all at STP: Ne, SF₆, N₂, CH₄. (d) Which one has the highest total molecular volume relative to the space occupied by the gas?

Key Concepts

Ideal Gas Law

The Ideal Gas Law (PV=nRT) describes the relationship between pressure (P), volume (V), temperature (T), and the number of moles (n) of a gas. At standard temperature and pressure (STP), gases behave ideally, allowing for the comparison of their volumes. Understanding this law is crucial for analyzing how different gases occupy space under the same conditions.

Molar Volume of Gases

At STP, one mole of an ideal gas occupies a volume of 22.4 liters. This concept allows for the comparison of the volumes of different gases based on their molar masses and molecular structures. Gases with larger molar masses or more complex structures may occupy more space, influencing their total molecular volume.

Density of Gases

The density of a gas is defined as its mass per unit volume. It is influenced by the molecular weight and the conditions of temperature and pressure. In the context of the question, understanding the densities of Ne, SF6, N2, and CH4 helps determine which gas has the highest total molecular volume relative to the space it occupies, as denser gases will have more mass in the same volume.