"Cp=Cv+R" or "Cp-Cv=R"....Whats the name of this Equation or Relation?

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Discussion Overview

The discussion revolves around the relationship between the specific heats at constant pressure (Cp) and constant volume (Cv) in thermodynamics, specifically questioning the naming of the equations "Cp=Cv+R" and "Cp-Cv=R". Participants express confusion and seek clarification on these equations and their definitions.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Meta-discussion

Main Points Raised

  • One participant expresses confusion about whether "Cp=Cv+R" or "Cp-Cv=R" is the correct equation and seeks the name of this relation.
  • Another participant suggests that the answer can be found quickly using Google, indicating a lack of patience for the inquiry.
  • A participant mentions encountering Mayer's formula, which relates the difference between Cp and Cv to the gas constant R divided by the molecular weight of the gas, but expresses confusion about the definition.
  • There is a discussion about the terminology of R, with questions about whether it is referred to as the molar gas constant, gas constant, or universal gas constant, and if these terms are interchangeable.
  • One participant asserts that "Cp-Cv=r" is the mathematical form of Mayer's formula and seeks to clarify the name of the relation or equation.
  • Another participant asks for a thermodynamic explanation of the equation "Cp-Cv=R".
  • Repeated requests for the name of the equation indicate a lack of consensus or clarity among participants.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the name of the equation or relation in question, and multiple viewpoints regarding the definitions and terminology of the constants involved are presented.

Contextual Notes

There are unresolved questions regarding the definitions of the gas constants and the specific heats, as well as the relationship between them. The discussion reflects varying levels of understanding and differing approaches to finding information.

DeLiRioUsVAMP
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hi m a new member here...actually i m in a great confusion...please solve dis confusion fer me...its related to THERMODYNAMICS...
my question is..
"Cp=Cv+R" or "Cp-Cv=R"...Whats the name of this Equation or Relation?I'll be waiting anxiously as well as curiously for the answer...I have been searching all this online and now my eyes are burning red...so I hope u people will help me...My last hope may be because i really want answers to these questions...i think they will be easy fer u ppl to answer ...!
 
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Well, you've obviously not been trying that long, one can find the answers within 10 seconds using Google.

I'm not going to do your work for you.
 
i have been trying long...but somewhere they didnt give the equation with the defination and sumwhere there was da equation...i had a doubt abt it but then there wasn't mentioned anything about it...


ok forget about the first two questions...they are not that imp fer me but da LAst quesss pleasezzzzzzzz answer that...and search it fer yerself on google too...i m sure u won't get the name fer da equation...atleast i didnt get it :((((
 
Do it yourself,

http://www.google.co.uk/search?q=Mayer's+Formula
 
eeeeeeee! i have tried dis out...in actual i wanted da name of that equation n i came across sum mayer formula n relation...n since i m having a headache i cudnt get on it so ...the defination of mayer's formula z " a formula which states that the difference between Cp n Cv is equal to R divided by the molecualr weight of the gas...



Now first i was thinking ..may be dats da Name of the equation..but then dis divididng da molecular weight thingy ,,,confused me :(((...
 
DeLiRioUsVAMP said:
eeeeeeee! i have tried dis out...in actual i wanted da name of that equation n i came across sum mayer formula n relation...n since i m having a headache i cudnt get on it so ...the defination of mayer's formula z " a formula which states that the difference between Cp n Cv is equal to R divided by the molecualr weight of the gas...
Almost, R is called the molar gas constant.
 
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but i thought R is da Universal Gas constant? i mean lyk iznt R da gas constant
 
i mean to ask lyk...molar gas constant,gas constant and universal gas constant...all are da names of R? no difference in these 3?
 
seriously tell me

Cp-Cv=r where "r" is the "specific gas constant" and it is equal to "molar gas constant divided by molecular weight of the gas"

and according to the defination of Mayer's formula ...this is the Mayer's formula mathematical form "Cp-Cv=r"but what i actually need help on is that i want to know the name of this relation/equation

Cp-Cv=R
or
Cp=Cv+Rso please help me
 
Last edited by a moderator:
  • #10
Hootenanny said:
Almost, R is called the molar gas constant which can be found by dividing the gas constant by the molar mass.

What is the thermodynamic explanation for Cp-Cv=R ?
 
  • #11
GT1 said:
What is the thermodynamic explanation for Cp-Cv=R ?
My bad, I realized once I'd posted it and edited my post about ten minutes ago. Apologies for the confusion.
 
  • #12
So...can anyone now please tell me that what is the name of this equation or relation "Cp-Cv=R or Cp=Cv+R"



I would really be so very thankful to you people
 
  • #13
DeLiRioUsVAMP said:
what is the name of this equation

Look at the Google search that Hootenanny gave you in post #4 of this thread.
 
  • #14
DeLiRioUsVAMP said:
Two questions...they are not that imp fer me but da LAst quesss pleasezzzzzzzz answer that...and search it fer yerself on google too...i m sure u won't get the name fer da equation...atleast i didnt get it :((((

... and seriously, please write in English. It doesn't take long to type words out in full, and it saves a lot of annoyance to the reader (i.e. the person you are asking to help you!)
 

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