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Progress is impossible without change; and those who cannot change their minds cannot change anything. ..."George Bernard Shaw(1865-1950, Irish dramatist, essayist and critic, Nobel Prize for Literature 1925)"

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rabea
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lots!

 « Embed this message on: March 31, 2005, 03:24:25 pm »

hey guys,
this is someones question and i dont know the answer so could anyone of u plz answer it for me??ASAP.thanx in advance.
i was trying to solve some thermodynamic numericals for my test next week and i couldn't solve this one.
A mass of liquid with volume V completely turns into a gas of volume V' at a constant external pressure P and temperature T.
The latent heat of vaporisation is L for the given mass.
what will be the change in the internal energy of the system??

a)PV'-PV

b)L-PV'+PV

c)zero

d)L+PV'-PV

take care
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Fu-Kwun Hwang
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 « Embed this message Reply #1 on: April 01, 2005, 10:51:25 am »

The work done is P(V'-V)
vaporisation process require energy L
so energy loss is P(V'-V)+L
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atifali12
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 3 atif « Embed this message Reply #2 on: September 18, 2014, 07:04:39 pm » posted from:Faisalabad,Punjab,Pakistan

vry nice post good
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Progress is impossible without change; and those who cannot change their minds cannot change anything. ..."George Bernard Shaw(1865-1950, Irish dramatist, essayist and critic, Nobel Prize for Literature 1925)"