Students can go through AP Inter 1st Year Physics Notes 14th Lesson Kinetic Theory will help students in revising the entire concepts quickly.

## AP Inter 1st Year Physics Notes 14th Lesson Kinetic Theory

→ A molecule moves along a straight line between two successive collisions and the average straight distance covered between two successive collisions is called the mean free path of the molecules.

→ Boyle’s Law states that, at constant temperature, the volume of a given mass of a gas is inversly proportional

to the pressure. V ∝ \(\frac{1}{p}\) (constant temperature)

→ Charle’s laws :

- At constant pressure, the volume of a given mass of a gas is directly proportional to the absolute temperature of the gas V ∝ T (P constant).
- At constant volume, the pressure of a given mass of a gas is directly proportional to the absolute temperature of the gas. P ∝ T (V constant)

→ Dalton’s law of partial pressures : It states that the total pressure exerted by a mixture of non-reactive ideal gases is equal to sum of the partial pressures which each would exert, if it alone occupied the same volume at the given temperature.

→ Root mean square speed is defined as the square root of the mean of the squares of the random velocities of the individual molecules of a gas.

V_{rms} = \(\sqrt{\frac{3 K_B \mathrm{~T}}{\mathrm{~m}}}\)