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An ideal monoatomic gas initially at 300k undergoes exp. at a pres of 2.5kPa. If vol. increases frm 1m 3 to 3m 3 then heat added to gas & its final temp is. a) 12500j,450k b)12500j,600k c)12500j,900k d)25000j,1200k pls tell how.


An ideal monoatomic gas initially at 300k undergoes exp. at a pres of 2.5kPa.  If vol. increases frm 1m3 to 3m3 then heat added to gas & its final temp is.
 
a) 12500j,450k  b)12500j,600k  c)12500j,900k  d)25000j,1200k
 
pls tell how.


Grade:11

1 Answers

neeraj agarwal
34 Points
9 years ago
W = Pext dV = 2.5 kpa * (3 -1) = 5 k J final temperature of the gas pressure is constant ...... v is proportional to T temperature 900 k . internal energy change = Cv dT = 3 /2 * 8.3 * 600 use first law of thermodynamics .

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