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Question

Write short notes on the gas laws.


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Solution

The Gas Laws

  • Gas laws are the result of various research activities on the physical properties of gases carried out by scientists in the late 16th century.
  • The relationship between various physical properties of gases such as Temperature, Volume, mass, and pressure are obtained through these gas laws.
  • Later on, these gas laws were combined to develop an Ideal Gas Law.

Boyle's Law

  • According to this law, for a fixed amount of gas and at a constant temperature, the pressure exerted by a gas on the walls of container is inversely proportional to the volume occupied by the gas.
  • It can be represented mathematically as,
    P1V or PV=constant
    Where, P is the pressure exerted by gas and V is the volume occupied by the gas

Charle's Law

  • According to this law, for a fixed amount of gas and at constant pressure, the volume occupied by the gas is directly proportional to the absolute temperature of the gas.
  • It can be represented mathematically as,
    VT or VT=constant
    Where, T is the absolute temperature of the gas, V is the volume occupied by the gas.

Gay Lussac's Law

  • According to this law, for a fixed amount of gas and at constant Volume, the Pressure exerted by a gas is directly proportional to the absolute temperature of the gas.
  • It can be represented mathematically as,
    PT or PT=constant
    Where, P is the pressure exerted by gas and T is absolute temperature.

Avogadro's Law

  • According to this law, At constant pressure and temperature, the number of moles of a gas is directly proportional to the volume occupied by gas.
  • It can be represented mathematically as,
    Vn or Vn=constant
    Where V is the volume occupied by gas and n is the number of moles of gas

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