Relationship between two specific heat, Mechanical Engineering

Assignment Help:

Relationship between two specific heat ?

Sol:  dQ = dU + dW; for a perfect gas

dQ at constant pressure

dU at Constant volume; = mCvdT = mCv(T2  - T1)

dW at constant pressure = PdV = P(V2  - V1) = mR(T2  - T1) Putting all values we get

dQ = mCv(T2  - T1) + mR(T2  - T1)

dQ = m(CV  + R)(T2  - T1)

but                      dQ = mCp(T2  - T1)

mCp(T2  - T1) = m(CV  + R)(T2  - T1)

Cp  = CV  + R; Cp - CV  = R                                                                                                  ...(i)

Now divided by Cv; we get

Cp /CV  - 1 = R/Cv; Since Cp /CV  = y (gama = 1.41)

y - 1 = R/Cv;

or                          Cv  = R/ (y - 1);     CP  = yR/ (y - 1); CP>CV; y>1

 


Related Discussions:- Relationship between two specific heat

Rich mixture-mixture requirement , Rich Mixture: It generally ranges...

Rich Mixture: It generally ranges from approximately 7 : 1 to 13 : 1 proportion of air to fuel by weight. To get a high power rich mixture is required. In fact to start the e

Brittle material, hello. what is the shape of the fractur of brittle materi...

hello. what is the shape of the fractur of brittle material after applied th tensil test.

the log and the ramp, A 228 kg log is pulled up a ramp by means of a rope ...

A 228 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of ki

Production test rings, Q. Production Test Rings? The frequency for the ...

Q. Production Test Rings? The frequency for the tests shall be as follows: • One sample at the 10th joint • One sample at the 75th joint • One sample at the 300th join

Factors affecting the selection of boiler, F AC T OR S AFFECTING THE SE...

F AC T OR S AFFECTING THE SELECTION OF BOILER: -     Working Pressure and amount of steam needed. -     Floor area required. -     Operating and Maintenance Required

Newton law of cooling, Ask question Briefly explain how, using Newton’s L...

Ask question Briefly explain how, using Newton’s Law of cooling, you may write the temperature of a cooling body as an exponential function of time#Minimum 100 words accepted#

Specific steam consumption in turbine, how degree of super heat reduces spe...

how degree of super heat reduces specific steam consumption

Kkleins constraction, What is the limition of kkleins constraction?

What is the limition of kkleins constraction?

Calculate the actual machining time, Calculate the Actual Machining Time ...

Calculate the Actual Machining Time Estimate the actual machining time required for the component of diameter 42 mm and length 120 mm. The available speeds are 70, 110, 176, 2

Flow rate, how to calculate flow rate of liquid nitrogen? melting point(-21...

how to calculate flow rate of liquid nitrogen? melting point(-210deg) boiling point(-195.8deg) critical temp(-149.9deg) relative density(0.8) specific gravity(808.5kg/m^3) rel

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd