Mechanical Engineering - Thermodynamics - Discussion
Discussion Forum : Thermodynamics - Section 1 (Q.No. 26)
26.
The value of specific heat at constant pressure (cp) is __________ that of at constant volume (cv).
Discussion:
15 comments Page 2 of 2.
Punit Kongi said:
10 years ago
Just imagine an IC engine.
At Cv-volume is constant, so if you give the heat (Q) to this, the piston does not move until total heat is being supplied.
At Cp-pressure will be constant, so the same heat (Q) what you are giving to will do addition work i.e. the piston will move down in this case to keep the pressure constant in this case.
Therefore Cp>Cv.
At Cv-volume is constant, so if you give the heat (Q) to this, the piston does not move until total heat is being supplied.
At Cp-pressure will be constant, so the same heat (Q) what you are giving to will do addition work i.e. the piston will move down in this case to keep the pressure constant in this case.
Therefore Cp>Cv.
Engr Arshad jamali said:
9 years ago
The value of cp always greater than cv because the relationship is cp - cv = R.
SAMBASIVA said:
7 years ago
Cp/Cv is greater than 1 so, Cp gerater than Cv.
Nitish said:
7 years ago
Cp = Cv for liquids.
And Cp>Cv for gases.
And Cp>Cv for gases.
Yash said:
6 years ago
Cp = R+Cv.
CP = 1.00 kJ/kg.K.
Cv = 0.718 kJ/kg.K.
CP = 1.00 kJ/kg.K.
Cv = 0.718 kJ/kg.K.
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