All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Will these changes increase, decrease, or have no effect on the mean free path of the molecules in a gas sample?increasing pressure.

Problem

Will these changes increase, decrease, or have no effect on the mean free path of the molecules in a gas sample?

increasing pressure.

Solution

We are asked to determine the effect of an increase in pressure on the mean free path of the molecules in a gas sample.

Recall:

The mean free path is the average distance a gas molecule will travel before colliding with another molecule, and it is related to the relative velocities and densities of potential collision partners. Assuming ideal gas behavior, the mean free path, λ, between two gas-phase molecules can be related to the temperature T and pressure P within an enclosed system (such as a molecular beam chamber) as follows:

λ=RT2πd2 NAP

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