Explain with equation how does entropy of a close system increase?
RANJAN DUTTA , 13 Years ago
Grade 12
Thermal Physics> CHEMICAL THERODYNAMICS...
1 Answers
AKASH GOYAL AskiitiansExpert-IITD
Last Activity: 13 Years ago
Dear Ranjan
In the absence of any friction, then the net entropy change is 0.
For any real process, there is friction. Entropy is transferred with heat transfer, and the direction of entropy transfer is the same as that of heat transfer. So, any time heat is transferred into the system, the entropy of the system increases. Any time heat is transferred out of the system, the entropy of the system decreases. Heat transfer out is the only means of decreasing system entropy of a closed system. For an open system, entropy can be transferred out with energy transfer out, and with mass transfer out.
so any real process increases the entropy of the system. But whether the entropy of the system itself increases or decreases is dependent on the heat transfer.
For an isolated system, there is no heat transfer, there is no means of reducing the entropy of the system. Which means that for any real process in an isolated system, the entropy of the system increases, and the energy available to do work decreases.
For any real process, there is friction. Entropy is transferred with heat transfer, and the direction of entropy transfer is the same as that of heat transfer. So, any time heat is transferred into the system, the entropy of the system increases. Any time heat is transferred out of the system, the entropy of the system decreases. Heat transfer out is the only means of decreasing system entropy of a closed system. For an open system, entropy can be transferred out with energy transfer out, and with mass transfer out.
so any real process increases the entropy of the system. But whether the entropy of the system itself increases or decreases is dependent on the heat transfer.
For an isolated system, there is no heat transfer, there is no means of reducing the entropy of the system. Which means that for any real process in an isolated system, the entropy of the system increases, and the energy available to do work decreases.
All the best.
AKASH GOYAL
AskiitiansExpert-IIT Delhi
Please feel free to post as many doubts on our discussion forum as you can. We are all IITians and here to help you in your IIT JEE preparation.
Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.
Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar respectively : Click here to download the toolbar..
Provide a better Answer & Earn Cool Goodies
Enter text here...
LIVE ONLINE CLASSES
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Ask a Doubt
Get your questions answered by the expert for free
Enter text here...
Other Related Questions on Thermal Physics
A container filled with a sample of an Idea gas at the pressure of 1.5atm. the gas is compressed isothermal ly to one fourth of its original volume. What is the new pressure of the gas?
Thermal Physics
0 Answer Available
Last Activity: 1 Year ago(s)
how do we know the electric field due to an electric dipole of dipole moment P at distance r from the centre of dipole is fiven by .. where theta is angle between p amd r vector..
Thermal Physics
0 Answer Available
Last Activity: 2 Year ago(s)
A A mole of helium gas initially at stp undergoes an isovolumetric process in which its pressure falls to half its initial value. The work done by gas is
Thermal Physics
0 Answer Available
Last Activity: 2 Year ago(s)
Please help me with theanswer of this questionrelated to radiation graph
Thermal Physics
0 Answer Available
Last Activity: 2 Year ago(s)