A dorm room measures 3m x 3m x 2m, (a) how many air
molecules does it contain (hint: assume air is an ideal
(b) What is the total translational KE of these
molecules? (hint:in an ideal gas, thermal energy
provide translational KE)
(c) How is this energy compared to the KE of a 2000kg
car going at 108km/h?
The ideal gas equation relating pressure (P), Volume (V), and absolute temperature (T) can be written as:
At Normal Conditions; P = 1 atm and T = 300 K
No , of molecules :
v = 108 km/h = 30 m/s
Kinetic Energy of Car is times than the Kinetic Energy of molecules in the room.
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