Chemistry: Gas Laws

Gas Laws: Problem Set Overview

We have 17 ready-to-use problem sets on the topic of gas laws and gas stoichiometry. These problem sets will focus on the mathematical relationship and inter-dependency between the pressure, volume, temperature, and the number of moles of a sample of gas. These so-called gas laws will also be used to analyze the relationship between the amounts of reactants and products involved in reactions that include gaseous reactants and/or products. Problems will range from the very easy plug-and-chug to the more difficult analysis of reactions involving solutions.

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Our work crews are working hard on preparing some pretty awesome problems sets on the topic of Gas Laws.

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Properties of a Gas

A sample of gas can be described quantitatively by four different properties - pressure, volume, temperature, and the number of moles. Problems in this problem set will typically pertain to one or more these gas properties. An understanding of the mathematics of gases should be built upon a conceptual understanding of the properties.

The pressure of a gas is defined as the cummulative amount of force applied to the container walls per surface area of the container. In equation form, we would write ...

Pressure = Force /Area

Gas particles are in constant random motion at relatively high speeds. The force in the above equation is the result of collisions of the particles with the container walls. Numerous factors are related to the strength of this force; the speed at which particles move, the mass of the particles, and the frequency with which collisions occur are three of these factors.

The temperature of a gas is typically measured by a thermometer. This temperature provides a measure of the average amount of kinetic energy possessed by the gas particles. Since kinetic energy of a gas particle is related to the speed of the particle, one can conclude that a gas at a high temperature will have faster moving particles (on average) than a gas held at a low temperature. In this sense, a thermometer can be thought of as a gas particle speedometer.

The volume of a gas refers to the amount of space which the gas occupies. Since a gas will fill the entire container that it is present in, the volume of a gas is simply equal to the volume of the container that holds it.

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