Entropy of Activation Calculator

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✖The Pre-Exponential Factor is the pre-exponential constant in the Arrhenius equation, an empirical relationship between temperature and rate coefficient.ⓘ Pre-Exponential Factor [A]			+10% -10%
✖Temperature is the degree or intensity of heat present in a substance or object.ⓘ Temperature [T]			+10% -10%

✖Entropy of activation is one of the two parameters which are typically obtained from the temperature dependence of reaction rate constant using Eyring equation of transition state theory.ⓘ Entropy of Activation [S_Activation]

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Entropy of Activation

Formula

`"S"_{"Activation"} = ("[Molar-g]"*ln("A"))-"[Molar-g]"*ln("[Molar-g]"*"T")/"[Avaga-no]"*"[hP]"`

Example

`"22.51608J/K*mol"=("[Molar-g]"*ln("15/s"))-"[Molar-g]"*ln("[Molar-g]"*"85K")/"[Avaga-no]"*"[hP]"`

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Entropy of Activation Solution

STEP 0: Pre-Calculation Summary

Formula Used

Entropy of Activation = ([Molar-g]*ln(Pre-Exponential Factor))-[Molar-g]*ln([Molar-g]*Temperature)/[Avaga-no]*[hP]
S_Activation = ([Molar-g]*ln(A))-[Molar-g]*ln([Molar-g]*T)/[Avaga-no]*[hP]
This formula uses 3 Constants, 1 Functions, 3 Variables

Constants Used

[Avaga-no] - Avogadro’s number Value Taken As 6.02214076E+23
[Molar-g] - Molar gas constant Value Taken As 8.3145
[hP] - Planck constant Value Taken As 6.626070040E-34

Functions Used

ln - The natural logarithm, also known as the logarithm to the base e, is the inverse function of the natural exponential function., ln(Number)

Variables Used

Entropy of Activation - (Measured in Joule Per Kelvin Per Mole) - Entropy of activation is one of the two parameters which are typically obtained from the temperature dependence of reaction rate constant using Eyring equation of transition state theory.
Pre-Exponential Factor - (Measured in 1 per Second) - The Pre-Exponential Factor is the pre-exponential constant in the Arrhenius equation, an empirical relationship between temperature and rate coefficient.
Temperature - (Measured in Kelvin) - Temperature is the degree or intensity of heat present in a substance or object.

STEP 1: Convert Input(s) to Base Unit

Pre-Exponential Factor: 15 1 per Second --> 15 1 per Second No Conversion Required
Temperature: 85 Kelvin --> 85 Kelvin No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

S_Activation = ([Molar-g]*ln(A))-[Molar-g]*ln([Molar-g]*T)/[Avaga-no]*[hP] --> ([Molar-g]*ln(15))-[Molar-g]*ln([Molar-g]*85)/[Avaga-no]*[hP]

Evaluating ... ...

S_Activation = 22.5160833970643

STEP 3: Convert Result to Output's Unit

22.5160833970643 Joule Per Kelvin Per Mole --> No Conversion Required

FINAL ANSWER

22.5160833970643 ≈ 22.51608 Joule Per Kelvin Per Mole <-- Entropy of Activation

(Calculation completed in 00.009 seconds)

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< 5 Transition State Theory Calculators

Rate Constant of Reaction by Erying Equation

Go Rate Constant = ([BoltZ]*Temperature*exp(Entropy of Activation/[Molar-g])*exp(-Enthalpy of Activation/[Molar-g]*Temperature))/[hP]

Entropy of Activation

Go Entropy of Activation = ([Molar-g]*ln(Pre-Exponential Factor))-[Molar-g]*ln([Molar-g]*Temperature)/[Avaga-no]*[hP]

Enthalpy of Activation

Go Enthalpy of Activation = (Activation Energy-(Change in No of Moles of Gas from Rct to AC*[Molar-g]*Temperature))

Thermodynamic Equilibrium Constant

Go Thermodynamic Equillibrium Constant = e^(Change in Free Energy/([Molar-g]*Temperature))

Enthalpy of Activation Given Slope of line

Go Enthalpy of Activation = -(Slope of Line B/w Ln K and 1/T*2.303*[Molar-g])

Entropy of Activation Formula

Entropy of Activation = ([Molar-g]*ln(Pre-Exponential Factor))-[Molar-g]*ln([Molar-g]*Temperature)/[Avaga-no]*[hP]
S_Activation = ([Molar-g]*ln(A))-[Molar-g]*ln([Molar-g]*T)/[Avaga-no]*[hP]

What is Transition State Theory ?

Transition state theory explains the reaction rates of elementary chemical reactions. The theory assumes a special type of chemical equilibrium (quasi-equilibrium) between reactants and activated transition state complexes.

How to Calculate Entropy of Activation?

Entropy of Activation calculator uses Entropy of Activation = ([Molar-g]*ln(Pre-Exponential Factor))-[Molar-g]*ln([Molar-g]*Temperature)/[Avaga-no]*[hP] to calculate the Entropy of Activation, Entropy of activation is one of the two parameters which are typically obtained from the temperature dependence of reaction rate constant using Eyring equation of transition state theory. Entropy of Activation is denoted by S_Activation symbol.

How to calculate Entropy of Activation using this online calculator? To use this online calculator for Entropy of Activation, enter Pre-Exponential Factor (A) & Temperature (T) and hit the calculate button. Here is how the Entropy of Activation calculation can be explained with given input values -> 22.51608 = ([Molar-g]*ln(15))-[Molar-g]*ln([Molar-g]*85)/[Avaga-no]*[hP].

FAQ

What is Entropy of Activation?

Entropy of activation is one of the two parameters which are typically obtained from the temperature dependence of reaction rate constant using Eyring equation of transition state theory and is represented as S_Activation = ([Molar-g]*ln(A))-[Molar-g]*ln([Molar-g]*T)/[Avaga-no]*[hP] or Entropy of Activation = ([Molar-g]*ln(Pre-Exponential Factor))-[Molar-g]*ln([Molar-g]*Temperature)/[Avaga-no]*[hP]. The Pre-Exponential Factor is the pre-exponential constant in the Arrhenius equation, an empirical relationship between temperature and rate coefficient & Temperature is the degree or intensity of heat present in a substance or object.

How to calculate Entropy of Activation?

Entropy of activation is one of the two parameters which are typically obtained from the temperature dependence of reaction rate constant using Eyring equation of transition state theory is calculated using Entropy of Activation = ([Molar-g]*ln(Pre-Exponential Factor))-[Molar-g]*ln([Molar-g]*Temperature)/[Avaga-no]*[hP]. To calculate Entropy of Activation, you need Pre-Exponential Factor (A) & Temperature (T). With our tool, you need to enter the respective value for Pre-Exponential Factor & Temperature and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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