1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days
8104911739

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number

022-62211530

Mon to Sat - 11 AM to 8 PM

applying first law of thermodynamics obtain an adiabatic relation between pressure and volume.

Asked by ashwinikumar59 16th February 2011, 7:13 AM
Dear student

A/C to 1st law of thermodynamics;

﻿
dQ= dU + PdV
For adiabatic process, dQ=0
So, dU + PdV=0
or, dU = -PdV
When the expansion takes place, volume of the gas increases i.e. dV = +ve, hence dU = -ve
;
i.e. internal energy of the gas decreases and hence the temperature falls.
If the gas is compressed, volume of the gas decreases, i.e. dV = -ve, hence dU = +ve; i.e.
internal energy of the gas increase and hencew its temperature increase.
Hope this clarifies your doubt.
Regards
Team
Topperlearning
Answered by Expert 16th February 2011, 9:40 AM
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10

You have rated this answer /10

Free related questions

18th November 2016, 1:42 PM
18th November 2016, 11:58 AM
RELATED STUDY RESOURCES :
CBSE Class-11-science QUESTION ANSWERS

Latest Questions

CBSE XI Science Mathematics
Asked by borahbhairabjyoti60 23rd March 2019, 11:31 PM