Question icon
Grade 11Physical Chemistry

What is the correct answer of D-9 ....in the solution it is given that Cp-Cv=2 ... How we know that Cp-Cv=R

Question image for What is the correct answer of D-9 ....in the solut
Profile image of Rahul pandey
9 Years agoGrade 11
Answers icon

1 Answer

Profile image of Vikas TU
9 Years ago
It is the derviationa nd result U have to remember.
At Cp value,
dQ = 1*Cp*dT = CpdT
At Cv value,
dQ’ = CvdT
and
dQ = dQ’ + W
After substituting the values we get,
CpdT = CvdT + RdT (for one mole)
Hence,
(Cp – Cv)dT = RdT
we get,
Cp – Cv = R