6. • In 1662, Robert Boyle discovered this law
Robert Boyle
Law:WhenTemperature remaining constant, volume of a fixed
amount of gas is inversely proportional to the pressure of the
gas.
Pressure andVolume are Inversely Proportional
V ∞
1
P
V =
𝐾
P
PV = K
Here,
V =Volume
P = Pressure
K = Proportionality Constant
9. Jacques Charles
In 1802, Jacques Charles discovered this law
Law: When pressure remaining constant, volume of a fixed
amount at gas is directly proportional to the absolute
temperature of the gas.
Pressure and amount
Of gas are constant
10. Charles’s Law
Volume andTemperature are Directly Proportional
V ∞T
V = kT
V
T
= k
Here,
V = volume
T = temperature in kelvin
k = proportionality constant
13. Amedeo Avogadro
In 1811, Amedeo Avogadro discovered this law
Law: When temperature and pressure remaining constant, volume of a
fixed amount at gas is directly proportional to the number of the
molecules present in the gas.
Temperature and pressure
Are constant
14. Avogadro Law
Volume and number are directly proportional
v ∞ n
v = kn
v
n
= k
Here,
v = volume
n = number
k = proportionality constant
15. For comparing the same substance under two different sets of conditions, the law can be usefully
expressed as follows:
𝑉1
n1
=
𝑉2
n2
𝑉1
n1
= 𝑘
𝑉2
n2
= 𝑘
