Charles's Law states that the volume of an ideal gas is directly proportional to its absolute temperature when the pressure is held constant. This means that as the temperature increases, the volume of the gas also increases, and vice versa.
Mathematical expression:
V₁/T₁ = V₂/T₂
Where:
* V₁ is the initial volume
* T₁ is the initial absolute temperature (in Kelvin)
* V₂ is the final volume
* T₂ is the final absolute temperature (in Kelvin)
Explanation:
* Molecular Motion: As temperature increases, gas molecules gain kinetic energy and move faster. This increased motion causes them to collide with the container walls more frequently and with greater force.
* Expansion: To maintain constant pressure, the container must expand to accommodate the increased collisions. This results in an increase in volume.
Example:
If you have a balloon filled with air at room temperature and you heat the balloon, the air inside will expand, causing the balloon to inflate further.
Important Note:
* Charles's Law applies to ideal gases. Real gases exhibit deviations from ideal behavior at high pressures and low temperatures.
* The temperature must be in Kelvin (absolute temperature scale) for Charles's Law to hold true.
