Charle's Law

• Charles' Law


  Relationship between the volume and temperature of gases at constant pressure
• Charles' Law


  • Various gases expanded by the same amount when heated through the same temperature interval
  • The Kelvin temperature and the volume of a gas are directly related when there is no change in pressure
• French physicist who performed an experiment and discovered the relationship between volume and temperature of gases


  Jacques Alexandre Charles
• Experiment by Jacques Alexandre Charles

  1. Used a balloon, hot water, and cold water

  2. Observed the relationship between volume and temperature of gases at constant pressure
• Kelvin (K)


  Unit of temperature used to express temperature in Charles' Law
• Converting Celsius to Kelvin

  K=0C + 273.15
• Absolute zero is the lowest attainable temperature with a value of -273.15 0C
• Charles' Law mathematical expression

  V∞T or V/T = K, where K is proportional constant
• Equation for a given sample of gas under two different conditions at constant pressure

  V1/T1=V2/T2
• Charles law states that at constant pressure, the volume of a given mass of gas varies linearly with its Kelvin temperature.
• The volume of a gas is directly proportional to the absolute temperature
• At constant pressure, the volume of a gas increases by 0.37% per degree Celsius increase in temperature above room temperature (25°C).
• At constant pressure, the volume of a fixed amount of an ideal gas increases as its temperature rises.
• At absolute zero (-273.15°c), all gases would have a volume of zero.
• If the volume of a gas doubles, then the temperature also doubles (or vice versa).