0

Guest

Courses New

how did the relation cv = cp- R arises

how did the relation 
cv = cp- R arises

Grade:10

3 Answers

grenade
2061 Points
8 years ago
well if you know that 
change in enthalpy dH = change in internal energy dU + dnRdT
now open all the terms 
ncpdt  = ncvdt  +nrdt
cancelling the underlined and bold letters
cv=cp-R
 
grenade
2061 Points
8 years ago
i will refer u that u should again read class 11 physics and chemistry thermodynamics for your further clarification
Abhishek Singh
105 Points
8 years ago
It arises from the first law of the thermodynamics 
  
  dq = dU + pdv …..........(1)
 for const pressure dq= n Cp dT
and dU= nCvdT  
always holds true .
PV=nRT------> Pdv= nRdT at const pressure 
Put all these in eqn. 1
       n Cp dT = nCvdT + n RdT
----------> Cp - Cv = R 
 

Think You Can Provide A Better Answer ?

Other Related Questions on Thermal Physics

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More