H2P-247
Deriving gas pressure
H2 Physics · JC 1 · Medium · Deriving gas pressure
An ideal gas in a sealed container is at pressure and temperature . The volume of the container is suddenly doubled while the temperature is kept constant. According to the kinetic theory, why does the pressure of the gas decrease?
- Molecules strike the container walls less frequently, so the force per unit area falls.
- Molecules slow down and exert smaller forces in each collision.
- Molecules lose mass when the container expands, so their momentum decreases.
- Molecules attract each other more strongly and move away from the walls.
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