Gas Laws Part 1: Details About Boyle՚s Law: About Charle՚s Law (For CBSE, ICSE, IAS, NET, NRA 2022)

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Title: Gas Laws Part 1

  • Gas laws are those laws which describe the properties of gases with respect to temperature, moles, volume, and pressure.
  • The gas laws are a group of laws that govern the behavior of gases by providing relationships between the following:
  • The volume occupied by a gas.
  • The pressure exerted by a gas on the walls of its container.
  • The absolute temperature of the gas.
  • The amount of gaseous substance (or) the number of moles of gas.
  • The laws related to all these properties and help in the approximation for most of the gases.
  • In normal condition all gasses show similar behavior, variation occurs when the physical parameters such as temperature, pressure and volumes are slightly altered.
  • The gas laws were developed towards the end of the 18th century by numerous scientists (after whom, the individual laws are named) .
  • Law basically describes the deviations in the behavior of gases.
  • Gas laws were formulated at the end of the 18th century and were a result of many different science experiments.
  • There are many several types of gas laws, proposed by different scientists in different periods.
  • While the laws have been named after the scientist who discovered it.
  • Important thing to be aware of here is to understand the relationship between the different laws.
  • Boyle՚s law: which provides a relationship between the pressure and the volume of a gas
  • Charle՚s law: which provides a relationship between the volume occupied by a gas and the absolute temperature
  • Gay-Lussac law: which provides a relationship between the pressure exerted by a gas on the walls of its container and the absolute temperature associated with the gas
  • Avogadro՚s law: which provides a relationship between the volume occupied by a gas and the amount of gaseous substance
  • Combined Gas law

About Boyle՚s Law

About Boyle՚s Law
  • Boyle՚s law gives the relationship between the pressure of a gas and volume of the gas at a constant temperature.
  • Boyle՚s law, also called Mariotte՚s law, a relation concerning the compression and expansion of a gas at constant temperature.
  • Basically, the volume of a gas is inversely proportional to the pressure of a gas at a constant temperature.
  • Boyle՚s law equation is written as:

  • Where V is the volume of the gas,
  • P is the pressure of the gas
  • K1 is the constant.
  • Boyle՚s Law can be used to determine the current pressure or volume of gas and can be represented also as;

About Charle՚s Law

About Charley՚s Law
  • Charle՚s law states that at constant pressure, the volume of a gas is directly proportional to the temperature (in Kelvin) in a closed system.
  • In 1787, French physicists Jacques Charles, discovered the correlation between Temperature (T) and Volume (V) assuming Pressure (P) and Amount of Gas (n) remain constant
  • This law describes the relationship between the temperature and volume of the gas.
  • Mathematically, Charle՚s law can be expressed as;

  • Where, V = volume of gas,
  • T = temperature of the gas in Kelvin.
  • Another form of this equation can be written as;

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