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Peng–Robinson parameter a is an empirical parameter characteristic to equation obtained from Peng–Robinson model of real gas. Check FAQs
aPR=(([R]TVm-bPR)-p)(Vm2)+(2bPRVm)-(bPR2)α
aPR - Peng–Robinson Parameter a?T - Temperature?Vm - Molar Volume?bPR - Peng–Robinson Parameter b?p - Pressure?α - α-function?[R] - Universal gas constant?

Peng Robinson Parameter a, using Peng Robinson Equation Example

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Here is how the Peng Robinson Parameter a, using Peng Robinson Equation equation looks like with Values.

Here is how the Peng Robinson Parameter a, using Peng Robinson Equation equation looks like with Units.

Here is how the Peng Robinson Parameter a, using Peng Robinson Equation equation looks like.

-194805.6035Edit=((8.314585Edit22.4Edit-0.12Edit)-800Edit)(22.4Edit2)+(20.12Edit22.4Edit)-(0.12Edit2)2Edit
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Peng Robinson Parameter a, using Peng Robinson Equation Solution

Follow our step by step solution on how to calculate Peng Robinson Parameter a, using Peng Robinson Equation?

FIRST Step Consider the formula
aPR=(([R]TVm-bPR)-p)(Vm2)+(2bPRVm)-(bPR2)α
Next Step Substitute values of Variables
aPR=(([R]85K22.4m³/mol-0.12)-800Pa)(22.4m³/mol2)+(20.1222.4m³/mol)-(0.122)2
Next Step Substitute values of Constants
aPR=((8.314585K22.4m³/mol-0.12)-800Pa)(22.4m³/mol2)+(20.1222.4m³/mol)-(0.122)2
Next Step Prepare to Evaluate
aPR=((8.31458522.4-0.12)-800)(22.42)+(20.1222.4)-(0.122)2
Next Step Evaluate
aPR=-194805.603536469
LAST Step Rounding Answer
aPR=-194805.6035

Peng Robinson Parameter a, using Peng Robinson Equation Formula Elements

Variables
Constants
Peng–Robinson Parameter a
Peng–Robinson parameter a is an empirical parameter characteristic to equation obtained from Peng–Robinson model of real gas.
Symbol: aPR
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Temperature
Temperature is the degree or intensity of heat present in a substance or object.
Symbol: T
Measurement: TemperatureUnit: K
Note: Value can be positive or negative.
Molar Volume
Molar Volume is the volume occupied by one mole of a real gas at standard temperature and pressure.
Symbol: Vm
Measurement: Molar Magnetic SusceptibilityUnit: m³/mol
Note: Value can be positive or negative.
Peng–Robinson Parameter b
Peng–Robinson parameter b is an empirical parameter characteristic to equation obtained from Peng–Robinson model of real gas.
Symbol: bPR
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Pressure
Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
Symbol: p
Measurement: PressureUnit: Pa
Note: Value can be positive or negative.
α-function
α-function is a function of temperature and the acentric factor.
Symbol: α
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Universal gas constant
Universal gas constant is a fundamental physical constant that appears in the ideal gas law, relating the pressure, volume, and temperature of an ideal gas.
Symbol: [R]
Value: 8.31446261815324

Other Formulas to find Peng–Robinson Parameter a

​Go Peng Robinson Parameter a, of Real Gas given Critical Parameters
aPR=0.45724([R]2)Tc2Pc
​Go Peng Robinson parameter a, of Real Gas given Reduced and Actual Parameters
aPR=0.45724([R]2)(TTr)2pPr
​Go Peng Robinson Parameter a, using Peng Robinson Equation given Reduced and Critical Parameters
aPR=(([R](TcTr)(Vm,rVm,c)-bPR)-(PrPc))((Vm,rVm,c)2)+(2bPR(Vm,rVm,c))-(bPR2)α

Other formulas in Peng Robinson Parameter category

​Go Peng Robinson Parameter b of Real Gas given Reduced and Actual Parameters
bPR=0.07780[R]TTrpPr
​Go Peng Robinson Parameter b of Real Gas given Critical Parameters
bpara=0.07780[R]TcPc

How to Evaluate Peng Robinson Parameter a, using Peng Robinson Equation?

Peng Robinson Parameter a, using Peng Robinson Equation evaluator uses Peng–Robinson Parameter a = ((([R]*Temperature)/(Molar Volume-Peng–Robinson Parameter b))-Pressure)*((Molar Volume^2)+(2*Peng–Robinson Parameter b*Molar Volume)-(Peng–Robinson Parameter b^2))/α-function to evaluate the Peng–Robinson Parameter a, The Peng Robinson Parameter a, using Peng Robinson Equation formula is defined as an empirical parameter characteristic to equation obtained from Peng–Robinson model of real gas. Peng–Robinson Parameter a is denoted by aPR symbol.

How to evaluate Peng Robinson Parameter a, using Peng Robinson Equation using this online evaluator? To use this online evaluator for Peng Robinson Parameter a, using Peng Robinson Equation, enter Temperature (T), Molar Volume (Vm), Peng–Robinson Parameter b (bPR), Pressure (p) & α-function (α) and hit the calculate button.

FAQs on Peng Robinson Parameter a, using Peng Robinson Equation

What is the formula to find Peng Robinson Parameter a, using Peng Robinson Equation?
The formula of Peng Robinson Parameter a, using Peng Robinson Equation is expressed as Peng–Robinson Parameter a = ((([R]*Temperature)/(Molar Volume-Peng–Robinson Parameter b))-Pressure)*((Molar Volume^2)+(2*Peng–Robinson Parameter b*Molar Volume)-(Peng–Robinson Parameter b^2))/α-function. Here is an example- -196143.339405 = ((([R]*85)/(22.4-0.12))-800)*((22.4^2)+(2*0.12*22.4)-(0.12^2))/2.
How to calculate Peng Robinson Parameter a, using Peng Robinson Equation?
With Temperature (T), Molar Volume (Vm), Peng–Robinson Parameter b (bPR), Pressure (p) & α-function (α) we can find Peng Robinson Parameter a, using Peng Robinson Equation using the formula - Peng–Robinson Parameter a = ((([R]*Temperature)/(Molar Volume-Peng–Robinson Parameter b))-Pressure)*((Molar Volume^2)+(2*Peng–Robinson Parameter b*Molar Volume)-(Peng–Robinson Parameter b^2))/α-function. This formula also uses Universal gas constant .
What are the other ways to Calculate Peng–Robinson Parameter a?
Here are the different ways to Calculate Peng–Robinson Parameter a-
  • Peng–Robinson Parameter a=0.45724*([R]^2)*(Critical Temperature^2)/Critical PressureOpenImg
  • Peng–Robinson Parameter a=0.45724*([R]^2)*((Temperature/Reduced Temperature)^2)/(Pressure/Reduced Pressure)OpenImg
  • Peng–Robinson Parameter a=((([R]*(Critical Temperature*Reduced Temperature))/((Reduced Molar Volume*Critical Molar Volume)-Peng–Robinson Parameter b))-(Reduced Pressure*Critical Pressure))*(((Reduced Molar Volume*Critical Molar Volume)^2)+(2*Peng–Robinson Parameter b*(Reduced Molar Volume*Critical Molar Volume))-(Peng–Robinson Parameter b^2))/α-functionOpenImg
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