Skip to main content
added 3 characters in body
Source Link
ACB
  • 2.6k
  • 2
  • 12
  • 36

In an adiabatic process we know there is no change in enthalpy or basically enthalpy change is zero. which means any external work done the internal energy does equal opposite work so as to keep $dH=0$. which means in adiabatic process the pressure and temperature have to change. but while deriving the equation for adiabatic process why do we say that $cp=cv+R$ when this can only be true for isobaric process where pressure is constant and also we introduce the term cp/cv$cp/cv$ being a constant value called adiabatic constant, my question is why do we even use cp value here while clearly in the adiabatic process pressure is not constant. whereWhere am iI going wrong? am iAm I wrong here because cp=cv+R$cp=cv+R$ is true for all processes but iI thought it is only true for isobaric process.

In an adiabatic process we know there is no change in enthalpy or basically enthalpy change is zero. which means any external work done the internal energy does equal opposite work so as to keep $dH=0$. which means in adiabatic process the pressure and temperature have to change. but while deriving the equation for adiabatic process why do we say that $cp=cv+R$ when this can only be true for isobaric process where pressure is constant and also we introduce the term cp/cv being a constant value called adiabatic constant, my question is why do we even use cp value here while clearly in the adiabatic process pressure is not constant. where am i going wrong? am i wrong here because cp=cv+R is true for all processes but i thought it is only true for isobaric process.

In an adiabatic process we know there is no change in enthalpy or basically enthalpy change is zero. which means any external work done the internal energy does equal opposite work so as to keep $dH=0$. which means in adiabatic process the pressure and temperature have to change. but while deriving the equation for adiabatic process why do we say that $cp=cv+R$ when this can only be true for isobaric process where pressure is constant and also we introduce the term $cp/cv$ being a constant value called adiabatic constant, my question is why do we even use cp value here while clearly in the adiabatic process pressure is not constant. Where am I going wrong? Am I wrong here because $cp=cv+R$ is true for all processes but I thought it is only true for isobaric process.

added 4 characters in body; edited tags; edited title; edited tags
Source Link
Qmechanic
  • 212.7k
  • 48
  • 589
  • 2.3k

why Why is cp$c_p/cvc_v$ term introduced in adiabatic process?

In an adiabatic process we know there is no change in enthalpy or basically enthalpy change is zero. which means any external work done the internal energy does equal opposite work so as to keep dH=0$dH=0$. which means in adiabatic process the pressure and temperature have to change. but while deriving the equation for adiabatic process why do we say that cp=cv+R$cp=cv+R$ when this can only be true for isobaric process where pressure is constant and also we introduce the term cp/cv being a constant value called adiabatic constant, my question is why do we even use cp value here while clearly in the adiabatic process pressure is not constant. where am i going wrong? am i wrong here because cp=cv+R is true for all processes but i thought it is only true for isobaric process.

why is cp/cv term introduced in adiabatic process?

In an adiabatic process we know there is no change in enthalpy or basically enthalpy change is zero. which means any external work done the internal energy does equal opposite work so as to keep dH=0. which means in adiabatic process the pressure and temperature have to change. but while deriving the equation for adiabatic process why do we say that cp=cv+R when this can only be true for isobaric process where pressure is constant and also we introduce the term cp/cv being a constant value called adiabatic constant, my question is why do we even use cp value here while clearly in the adiabatic process pressure is not constant. where am i going wrong? am i wrong here because cp=cv+R is true for all processes but i thought it is only true for isobaric process.

Why is $c_p/c_v$ term introduced in adiabatic process?

In an adiabatic process we know there is no change in enthalpy or basically enthalpy change is zero. which means any external work done the internal energy does equal opposite work so as to keep $dH=0$. which means in adiabatic process the pressure and temperature have to change. but while deriving the equation for adiabatic process why do we say that $cp=cv+R$ when this can only be true for isobaric process where pressure is constant and also we introduce the term cp/cv being a constant value called adiabatic constant, my question is why do we even use cp value here while clearly in the adiabatic process pressure is not constant. where am i going wrong? am i wrong here because cp=cv+R is true for all processes but i thought it is only true for isobaric process.

Source Link

why is cp/cv term introduced in adiabatic process?

In an adiabatic process we know there is no change in enthalpy or basically enthalpy change is zero. which means any external work done the internal energy does equal opposite work so as to keep dH=0. which means in adiabatic process the pressure and temperature have to change. but while deriving the equation for adiabatic process why do we say that cp=cv+R when this can only be true for isobaric process where pressure is constant and also we introduce the term cp/cv being a constant value called adiabatic constant, my question is why do we even use cp value here while clearly in the adiabatic process pressure is not constant. where am i going wrong? am i wrong here because cp=cv+R is true for all processes but i thought it is only true for isobaric process.