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.
Sourabh said:
10 years ago
Consider the piston cylinder arrangement and supply heat to it.
In constant pressure process piston is free to move as p is constant so drag force is neglected it means there will be increase in internal energy and boundary work.
In constant volume process: All the energy will be used to raise the internal energy as the boundary work is zero.
So cp is greater then cv always.
In constant pressure process piston is free to move as p is constant so drag force is neglected it means there will be increase in internal energy and boundary work.
In constant volume process: All the energy will be used to raise the internal energy as the boundary work is zero.
So cp is greater then cv always.
(1)
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.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers