Charles' Law: Temperature-Pressure Relationship

Charles' Law

Temperature-Pressure Relationship

• Charles' Law states that, at constant volume, the pressure of an ideal gas is directly proportional to the temperature of the gas.
• Mathematically, this can be expressed as:

P1 / T1 = P2 / T2

where P1 and P2 are the initial and final pressures, and T1 and T2 are the initial and final temperatures in Kelvin.

• The law implies that as the temperature of a gas increases, its pressure also increases, and vice versa.
• This relationship is based on the idea that as the temperature of a gas increases, the molecules gain kinetic energy and move more rapidly, resulting in increased collisions with the container walls and therefore increased pressure.

Key Points

• The law is only applicable to ideal gases, which do not exist in reality. However, it is a good approximation for real gases at low pressures and high temperatures.
• The law assumes that the volume of the gas is constant.
• The temperature must be expressed in Kelvin (K) for the law to hold true.
• Charles' Law is often used in conjunction with other gas laws, such as Boyle's Law and Avogadro's Law, to describe the behavior of gases in a wide range of situations.

Learn about Charles' Law, which states that the pressure of an ideal gas is directly proportional to its temperature. Understand the mathematical expression and key points of this law.