Question on: JAMB Physics - 2024
According to kinetic theory of gases, the pressure exerted by the gas on the wall is equal
A
change in momentum per unit volume
B
rate of change of momentum imparted by the walls per second per unit area
C
momentum imparted to the walls per unit area
D
change in momentum imparted to the walls per unit area
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Correct Option: B
According to the kinetic theory of gases, the pressure exerted by a gas on the walls of its container arises from the collisions of the gas molecules with the walls. Here's why option B is the most appropriate:
- B. rate of change of momentum imparted by the walls per second per unit area: This statement accurately reflects the kinetic theory. Pressure is defined as force per unit area. The force exerted by the gas molecules on the walls is due to the change in momentum of the molecules during collisions. The rate of this momentum change over a given area determines the pressure.
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