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 2 years ago
An ideal gas is subjected to a cyclic process ABCD as depicted in the PV diagram given. Which of the following curves represents the equivalent cyclic process?
 2 years ago
An ideal gas is subjected to a cyclic process ABCD as depicted in the PV diagram given. Which of the following curves represents the equivalent cyclic process?

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aish_premrenu
 2 years ago
Best ResponseYou've already chosen the best response.0Where is the 'given' PV diagram?

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1359433955167:dw

aish_premrenu
 2 years ago
Best ResponseYou've already chosen the best response.0What's the question? cyclic process equivalent to? any equation given?

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0The diagram is on the extreme left is the PV Diagram and the all the 4 options given on PT diagram. My fault , I do not know how to amend the sketch as there is no eraser facility..One of the 4 options is right.

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1359435181308:dw

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0ok lets do this section by section.. in your original graph.. section A to B.. what kind of process is it??

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0It is const pr i.e isobaric one.

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0ok.. so you see that volume is expanding keeping pressure constant... now tell me during this process what happens to temperature?

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0PV=nRT v is directly proportional to T hence it creases.

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0correct.. so now.. match the options.. for AB section!!

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0which options can you eliminate ??

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0right extreme which is no 2 in this question.

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1359878043806:dw NOW TELL WHICH OPTION can you eliminate?

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0first column second row as it shows pr not constant. and as i have said right top most as the arrow is shown from B to A.( though I am not sure of that)

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0the arrow has to be opposite.. now i have marked 4 options dude.. i have called it A B C D.. :P.. so you are saying you can eliminate option C right??.. you are correct .. cause pressure is increasing in that you can also eliminate option A.. so its between option B and D..

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0why A? Pr as shown is constant here.

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0It was my fault not to show it correctly. Line ab at A is parallel.

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0ohhww.. ok ok :).. fine.. so then lets continue with section BC.. what do you think happens?

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0It is either isothermal or adiabatic

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0yea well.. its very difficult to make out if its an isothermal or adiabatic!! :/.. lets skip that.. and go to CD process!!

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0It is ischoric , volume is const.

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0correct.. and pressure is decreasing.. so temperature should be decreasing.. time to eliminate one more option.. which one?

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0correct.. so now it boils down to whether the BC and DA processes are adiabatic or isothermal.. thats where i really dunno how to find out.. :/.. but in your option B.. the order is opposite.. so if the directions are like that.. then option B can be eliminated right?

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0Problem is the correct option given is as B that is the right upper most. and not been explained. Pl help.

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0since its reversible maybe .. the direction doesn't matter.. !!!

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0you have to look at the curve in AB section.. if the curve is STEEEP .. its an adiabatic.. if the curve is not all that steep.. then its isothermal

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0can't draw :P.. http://physics.info/pressurevolume/ check this.. !!

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0Ok thanks I shall come back.

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0i need to go now.. sorry :(... but ll reply once i am back.. if no one else clears your doubt that is!!
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