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Enthalpy of Chemical Reaction using Equilibrium Constants Formula

GoEnthalpy of Chemical Reaction Formula

GoEnthalpy of Chemical Reaction at Absolute Temperatures Formula

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The Enthalpy of Reaction is the difference in enthalpy between products and reactants. Check FAQs

ΔH = - (\log 10 (\frac{K 2}{K 1}) \cdot [R] \cdot (\frac{T abs \cdot T 2}{T abs - T 2}))

ΔH - Enthalpy of Reaction?K₂ - Equilibrium constant 2?K₁ - Equilibrium constant 1?T_abs - Absolute Temperature?T₂ - Absolute temperature 2?[R] - Universal gas constant?

Enthalpy of Chemical Reaction using Equilibrium Constants Example

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Here is how the Enthalpy of Chemical Reaction using Equilibrium Constants equation looks like with Values.

Here is how the Enthalpy of Chemical Reaction using Equilibrium Constants equation looks like with Units.

Here is how the Enthalpy of Chemical Reaction using Equilibrium Constants equation looks like.

4.1937 = - (\log 10 (\frac{0.0431}{0.026}) \cdot 8.3145 \cdot (\frac{273.15 \cdot 310}{273.15 - 310}))

4.1937KJ/mol = - (\log 10 (\frac{0.0431}{0.026}) \cdot 8.3145 \cdot (\frac{273.15K \cdot 310K}{273.15K - 310K}))

4.1937 = - (\log 10 (\frac{0.0431}{0.026}) \cdot 8.3145 \cdot (\frac{273.15 \cdot 310}{273.15 - 310}))

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Enthalpy of Chemical Reaction using Equilibrium Constants Solution

Follow our step by step solution on how to calculate Enthalpy of Chemical Reaction using Equilibrium Constants?

FIRST Step Consider the formula

ΔH = - (\log 10 (\frac{K 2}{K 1}) \cdot [R] \cdot (\frac{T abs \cdot T 2}{T abs - T 2}))

Next Step Substitute values of Variables

∴

ΔH = - (\log 10 (\frac{0.0431}{0.026}) \cdot [R] \cdot (\frac{273.15K \cdot 310K}{273.15K - 310K}))

Next Step Substitute values of Constants

∴

ΔH = - (\log 10 (\frac{0.0431}{0.026}) \cdot 8.3145 \cdot (\frac{273.15K \cdot 310K}{273.15K - 310K}))

Next Step Prepare to Evaluate

∴

ΔH = - (\log 10 (\frac{0.0431}{0.026}) \cdot 8.3145 \cdot (\frac{273.15 \cdot 310}{273.15 - 310}))

Next Step Evaluate

∴

ΔH = 4193.74361560332J/mol

Next Step Convert to Output's Unit

∴

ΔH = 4.19374361560332KJ/mol

LAST Step Rounding Answer

∴

ΔH = 4.1937KJ/mol

Enthalpy of Chemical Reaction using Equilibrium Constants Formula Elements

Variables

Constants

Functions

Enthalpy of Reaction

The Enthalpy of Reaction is the difference in enthalpy between products and reactants.

Symbol: ΔH

Measurement: Energy Per MoleUnit: KJ/mol

Note: Value can be positive or negative.

Formulas to find Enthalpy of Reaction

Equilibrium constant 2

Equilibrium constant 2 is the value of its reaction quotient at chemical equilibrium, at absolute temperature T2.

Symbol: K₂

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Equilibrium constant 2

Equilibrium constant 1

Equilibrium constant 1 is the value of its reaction quotient at chemical equilibrium, at absolute temperature T1.

Symbol: K₁

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Equilibrium constant 1

Absolute Temperature

Absolute Temperature is defined as the measurement of temperature beginning at absolute zero on the Kelvin scale.

Symbol: T_abs

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Absolute Temperature

Absolute temperature 2

Absolute temperature 2 is the temperature of an object on a scale where 0 is taken as absolute zero.

Symbol: T₂

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Absolute temperature 2

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

log10

The common logarithm, also known as the base-10 logarithm or the decimal logarithm, is a mathematical function that is the inverse of the exponential function.

Syntax: log10(Number)

Other Formulas to find Enthalpy of Reaction

Go Enthalpy of Chemical Reaction

ΔH = E af - E ab

Go Enthalpy of Chemical Reaction at Absolute Temperatures

ΔH = \log 10 (\frac{K 2}{K 1}) \cdot (2.303 \cdot [R]) \cdot (\frac{T abs \cdot T 2}{T 2 - T abs})

Other formulas in Arrhenius Equation category

Go Arrhenius Equation

K h = A \cdot (\exp (- (\frac{E a}{[R] \cdot T abs})))

Go Pre-exponential Factor in Arrhenius Equation

A = \frac{K h}{\exp (- (\frac{E a}{[R] \cdot T abs}))}

Go Arrhenius Equation for Forward Reaction

K f = A f \cdot \exp (- (\frac{E af}{[R] \cdot T abs}))

Go Pre-exponential Factor in Arrhenius Equation for Forward Reaction

A f = \frac{K f}{\exp (- (\frac{E af}{[R] \cdot T abs}))}

How to Evaluate Enthalpy of Chemical Reaction using Equilibrium Constants?

Enthalpy of Chemical Reaction using Equilibrium Constants evaluator uses Enthalpy of Reaction = -(log10(Equilibrium constant 2/Equilibrium constant 1)*[R]*((Absolute Temperature*Absolute temperature 2)/(Absolute Temperature-Absolute temperature 2))) to evaluate the Enthalpy of Reaction, The Enthalpy of chemical reaction using equilibrium constants formula is defined as the difference in activation energy between products and reactants for forward and backward reactions at absolute temperatures T1 and T2. Enthalpy of Reaction is denoted by ΔH symbol.

How to evaluate Enthalpy of Chemical Reaction using Equilibrium Constants using this online evaluator? To use this online evaluator for Enthalpy of Chemical Reaction using Equilibrium Constants, enter Equilibrium constant 2 (K₂), Equilibrium constant 1 (K₁), Absolute Temperature (T_abs) & Absolute temperature 2 (T₂) and hit the calculate button.

FAQs on Enthalpy of Chemical Reaction using Equilibrium Constants

What is the formula to find Enthalpy of Chemical Reaction using Equilibrium Constants?

The formula of Enthalpy of Chemical Reaction using Equilibrium Constants is expressed as Enthalpy of Reaction = -(log10(Equilibrium constant 2/Equilibrium constant 1)*[R]*((Absolute Temperature*Absolute temperature 2)/(Absolute Temperature-Absolute temperature 2))). Here is an example- 0.004194 = -(log10(0.0431/0.026)*[R]*((273.15*310)/(273.15-310))).

How to calculate Enthalpy of Chemical Reaction using Equilibrium Constants?

With Equilibrium constant 2 (K₂), Equilibrium constant 1 (K₁), Absolute Temperature (T_abs) & Absolute temperature 2 (T₂) we can find Enthalpy of Chemical Reaction using Equilibrium Constants using the formula - Enthalpy of Reaction = -(log10(Equilibrium constant 2/Equilibrium constant 1)*[R]*((Absolute Temperature*Absolute temperature 2)/(Absolute Temperature-Absolute temperature 2))). This formula also uses Universal gas constant and Common Logarithm (log10) function(s).

What are the other ways to Calculate Enthalpy of Reaction?

Here are the different ways to Calculate Enthalpy of Reaction-

Enthalpy of Reaction=Activation Energy Forward-Activation Energy Backward
Enthalpy of Reaction=log10(Equilibrium constant 2/Equilibrium constant 1)*(2.303*[R])*((Absolute Temperature*Absolute temperature 2)/(Absolute temperature 2-Absolute Temperature))

Can the Enthalpy of Chemical Reaction using Equilibrium Constants be negative?

Yes, the Enthalpy of Chemical Reaction using Equilibrium Constants, measured in Energy Per Mole can be negative.

Which unit is used to measure Enthalpy of Chemical Reaction using Equilibrium Constants?

Enthalpy of Chemical Reaction using Equilibrium Constants is usually measured using the KiloJoule Per Mole[KJ/mol] for Energy Per Mole. Joule Per Mole[KJ/mol], Kilocalorie Per Mole[KJ/mol] are the few other units in which Enthalpy of Chemical Reaction using Equilibrium Constants can be measured.

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Enthalpy of Chemical Reaction using Equilibrium Constants Formula

​GoEnthalpy of Chemical Reaction Formula

​GoEnthalpy of Chemical Reaction at Absolute Temperatures Formula

Enthalpy of Chemical Reaction using Equilibrium Constants Example

Enthalpy of Chemical Reaction using Equilibrium Constants Solution

Enthalpy of Chemical Reaction using Equilibrium Constants Formula Elements

Other Formulas to find Enthalpy of Reaction

Other formulas in Arrhenius Equation category

How to Evaluate Enthalpy of Chemical Reaction using Equilibrium Constants?

FAQs on Enthalpy of Chemical Reaction using Equilibrium Constants

Variable Name

GoEnthalpy of Chemical Reaction Formula

GoEnthalpy of Chemical Reaction at Absolute Temperatures Formula