Q. 14.6( 17 Votes )
When we place a g
No, the kinetic energy of the molecule does not increase.
As we know that kinetic energy of ideal gas is given by
Where K. E=kinetic energy of gas
kB = Boltzmann constant
T = temperature of gas
The Boltzmann constant is a physical constant that relates the average
kinetic energy of particles in a gas with the temperature of the gas.
Since kB is a constant, kinetic energy of gas is proportional to
temperature of gas. Also, we know
Where v= velocity of gas
From equation (i) and equation (ii), we can say that the Kinetic energy of a gas is dependent on two factors-
1. Temperature (K.E. ∝ T)
2. Velocity (K.E. ∝ velocity2)
We can conclude that kinetic energy of gas will change only when there is a change in velocity of gas which in turn will change the temperature of gas. So, if van moves with uniform velocity (i.e. constant speed) no change in kinetic energy or temperature will be observed. Kinetic energy and temperature of the gas will only change when the van either decelerate or accelerate (rate of change of velocity).
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