A sample of gas is heated from 200K to 400K in a constant volumecontainer. Which

Question

A sample of gas is heated from 200K to 400K in a constant volumecontainer. Which of the following statements accurately describesthe sample at its new conditions?
1. The kinetic energies of all the molecules arehigher than before.
2. All the molecules are travelling with much higher speeds thanbefore.
3. The average kinetic energy of the molecules is higher thanbefore.
4. The average speed of the molecules is higher than before.
5. The molecules are hitting the walls more often, giving rise to ahigher pressure.

a) 1, 2, 3, 4, and 5
b) 1, 2, 3, and 4 only
c) 2, 3, and 4 only
d) 3 and 4 only
e) 3, 4, and 5 only

I have no idea...and this was a past testquestion...so please explain to me which choice is correct and why!Thanks.

Explanation / Answer

We know that kinetic energy , K.E. = (3/2) kT Where k = Boltzmann constant T = absolute temperature So K.E. T Also K.E. = (1/2) mv^2 K.E . v^2 So , all are correct So option (a) is correct

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