Amontons’s law
Definition
Amontons's law states that the pressure of a gas is directly proportional to its absolute temperature, assuming volume and amount of gas are constant. Mathematically, it is expressed as $P \propto T$ or $P/T = k$ where $k$ is a constant.
5 Must Know Facts For Your Next Test
- Amontons's law is also known as Gay-Lussac's Law.
- The law can be written as $\frac{P_1}{T_1} = \frac{P_2}{T_2}$ for comparing two different states of the same gas.
- Absolute temperature must be used in calculations (Kelvin scale).
- It applies only when the volume and amount of gas remain constant.
- Amontons's law helps explain why pressure cookers work efficiently.
Review Questions
- What relationship does Amontons's law describe?
- How would you express Amontons's law mathematically?
- Why must temperatures be converted to Kelvin when using Amontons's law?
"Amontons’s law" appears in:
Related terms
Boyle's Law: States that the pressure of a gas is inversely proportional to its volume at constant temperature and amount of gas.
Charles's Law: States that the volume of a gas is directly proportional to its absolute temperature at constant pressure and amount of gas.
Ideal Gas Law: A comprehensive equation, $PV = nRT$, that relates pressure, volume, number of moles, and temperature of an ideal gas.
