Mechanical Engineering - Thermodynamics - Discussion
Discussion Forum : Thermodynamics - Section 1 (Q.No. 20)
20.
The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is
Discussion:
26 comments Page 2 of 3.
Prasanth said:
1 decade ago
Because Cp is always greater than Cv.
Akshay said:
1 decade ago
@Prasanth.
Why so? Why Cp is always greater than Cv?
Why so? Why Cp is always greater than Cv?
ROHIT KUMAR said:
1 decade ago
Since cp > cv & R = cp/cv.
So R(cp/cv) is always greater than 1.
So R(cp/cv) is always greater than 1.
Arif alam said:
1 decade ago
At constant volume the heat is directly increase the temperature but at constant pressure heat is given to the system then temp is increased and also expand so some heat is extra needed.
Jyoti prakash said:
1 decade ago
Cp is always greater than Cv, R = Cp>Cv
Arjun said:
1 decade ago
cp/cv or Y always greater than 1.
Monoatomic gases Y = 5/3 like cr, ne, he.
Diatomic Y = 7/5 or 1.4 like o2, n2, h2.
Triatomic or polyatomic Y = 4/3 or 1.33 like so2, co2.
Monoatomic gases Y = 5/3 like cr, ne, he.
Diatomic Y = 7/5 or 1.4 like o2, n2, h2.
Triatomic or polyatomic Y = 4/3 or 1.33 like so2, co2.
Ashish said:
1 decade ago
Cp/Cv = Gamma, which is the indices of the process and depends on the process. For isotropic process its 1.4, for polytropic process its n, for constant pressure process its zero, for constant volume process its infinite, for constant temperature process its equal to 1.
Jay Patel said:
1 decade ago
Why CP is greater than 1?
(1)
Priya said:
1 decade ago
cp/cv = Gamma = 1.4 = Constant.
(1)
Manish singh said:
10 years ago
Because cv is always greater than 1.
(1)
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