Q.

The total KE of all the molecules of helium having a volume V exerting a pressure P is 1500J  The total KE in joule of all the molecules of N2 having the same volume V and exerting a pressure 2P is 

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a

6000

b

3000

c

5000

d

7000

answer is B.

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Detailed Solution

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Explanation

Total energy = f/2 PV  

For helium,

E = 3/2PV = 1500    

PV=1000

For nitrogen,

E1 = 5/2(2P)V = 5PV = 5000J

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