Kaplan Nursing Entrance Exam Practice 2026 – Comprehensive Prep

The ideal gas law is a fundamental equation in chemistry that describes the behavior of an ideal gas. The correct formula, PV=nRT, incorporates several key variables: pressure (P), volume (V), the number of moles of gas (n), the ideal gas constant (R), and temperature (T) measured in Kelvin.

In this equation:

- P represents the pressure of the gas, which is typically measured in atmospheres or pascals.

- V is the volume of the gas, often measured in liters.

- n indicates the number of moles of gas, which provides a measure of the amount of substance.

- R is the universal gas constant, which is a proportionality factor that makes the equation valid and is specifically defined for ideal gases.

- T is the absolute temperature of the gas in Kelvin, which ensures that temperature is measured on a scale that starts at absolute zero.

The ideal gas law combines several individual gas laws, such as Boyle's law, Charles's law, and Avogadro's law, and illustrates how these concepts relate to one another in the behavior of gases. This relationship allows for predictions about how a gas will respond to changes in conditions, including variations in temperature, volume, and pressure.