Which assumptions of kinetic theory of gases are wrong?
Answers
Explanation:
The basic assumptions of the kinetic theory of an
ideal gas:
(1) A gas of a pure material consists of an extremely
large number of identical molecules.
(2) A gas molecule behaves as an ideal particle, ie., it
has mass but its struchure and size can be ignored as
compared with the intermolecular separation in a
diute gas and the dimensions of the container
(3) The molecules are in constant random motion with
various velocities and obey Newton's laws of
motion.
4) Intermolecular forces can be ignored on the average
so that the only forces between the molecules and
the walls of the container are contact forces during
collisions. It follows that between successive colli-
sions, a gas molecule travels in a straight line with
constant speed.
(5) The collisions are perfectly elastic conserving total
momentum and kinetic energy, and the duration of
a collision is very small compared to the time
interval between successive collisions
The assumptions of the kinetic theory of gases that have been found to be wrong or incorrect are The molecule does not exert any force of attraction between one and another
Detailed answer
Another limitation of one of the assumptions is that the total volume occupied by any gas molecule is completely negligible when comparing the total volume of the gas.
- This only happens when the pressure of the gas molecule is low and does not happen when the pressure is high.
- And in the first condition, it is only true when the pressure is low and the temperature is high.
- Another assumption is that the molecules are separated by a large distance when taking the comparison with their total size.