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Standard Enthalpy of Reaction at Equilibrium Formula

GoStandard Enthalpy of Reaction given Gibbs Free Energy Formula

GoStandard Enthalpy at Initial Temperature T1 Formula

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Change in enthalpy is the thermodynamic quantity equivalent to the total difference between the heat content of a system. Check FAQs

ΔH = (T \cdot ΔS) - (2.303 \cdot [R] \cdot T \cdot \log 10 (K c))

ΔH - Change in Enthalpy?T - Temperature?ΔS - Change in Entropy?K_c - Equilibrium Constant?[R] - Universal gas constant?

Standard Enthalpy of Reaction at Equilibrium Example

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Here is how the Standard Enthalpy of Reaction at Equilibrium equation looks like with Values.

Here is how the Standard Enthalpy of Reaction at Equilibrium equation looks like with Units.

Here is how the Standard Enthalpy of Reaction at Equilibrium equation looks like.

10923.0923 = (85 \cdot 220) - (2.303 \cdot 8.3145 \cdot 85 \cdot \log 10 (60))

10923.0923J/kg = (85K \cdot 220J/kg*K) - (2.303 \cdot 8.3145 \cdot 85K \cdot \log 10 (60mol/L))

10923.0923 = (85 \cdot 220) - (2.303 \cdot 8.3145 \cdot 85 \cdot \log 10 (60))

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Standard Enthalpy of Reaction at Equilibrium Solution

Follow our step by step solution on how to calculate Standard Enthalpy of Reaction at Equilibrium?

FIRST Step Consider the formula

ΔH = (T \cdot ΔS) - (2.303 \cdot [R] \cdot T \cdot \log 10 (K c))

Next Step Substitute values of Variables

∴

ΔH = (85K \cdot 220J/kg*K) - (2.303 \cdot [R] \cdot 85K \cdot \log 10 (60mol/L))

Next Step Substitute values of Constants

∴

ΔH = (85K \cdot 220J/kg*K) - (2.303 \cdot 8.3145 \cdot 85K \cdot \log 10 (60mol/L))

Next Step Convert Units

∴

ΔH = (85K \cdot 220J/kg*K) - (2.303 \cdot 8.3145 \cdot 85K \cdot \log 10 (60000mol/m³))

Next Step Prepare to Evaluate

∴

ΔH = (85 \cdot 220) - (2.303 \cdot 8.3145 \cdot 85 \cdot \log 10 (60000))

Next Step Evaluate

∴

ΔH = 10923.0923499704J/kg

LAST Step Rounding Answer

∴

ΔH = 10923.0923J/kg

Standard Enthalpy of Reaction at Equilibrium Formula Elements

Variables

Constants

Functions

Change in Enthalpy

Change in enthalpy is the thermodynamic quantity equivalent to the total difference between the heat content of a system.

Symbol: ΔH

Measurement: Heat of Combustion (per Mass)Unit: J/kg

Note: Value can be positive or negative.

Formulas to find Change in Enthalpy

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.

Formulas to find Temperature

Change in Entropy

Change in entropy is the thermodynamic quantity equivalent to the total difference between the entropy of a system.

Symbol: ΔS

Measurement: Specific EntropyUnit: J/kg*K

Note: Value can be positive or negative.

Formulas to find Change in Entropy

Equilibrium Constant

Equilibrium Constant is the value of its reaction quotient at chemical equilibrium.

Symbol: K_c

Measurement: Molar ConcentrationUnit: mol/L

Note: Value can be positive or negative.

Formulas to find Equilibrium Constant

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 Change in Enthalpy

Go Standard Enthalpy of Reaction given Gibbs Free Energy

ΔH = G + (T \cdot ΔS)

Go Standard Enthalpy at Initial Temperature T1

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

Go Standard Enthalpy at Final Temperature T2

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

Other formulas in Thermodynamics in Chemical Equilibrium category

Go Gibbs Free Energy given Equilibrium Constant

G = - 2.303 \cdot [R] \cdot T \cdot \log 10 (K c)

Go Equilibrium constant given Gibbs free energy

K c = 10^{- (\frac{G}{2.303 \cdot [R] \cdot T})}

Go Temperature of Reaction given Equilibrium Constant and Gibbs Energy

T = \frac{G}{- 2.303 \cdot [R] \cdot \log 10 (K c)}

Go Gibbs Free Energy given Equilibrium Constant due to Pressure

G = - 2.303 \cdot [R] \cdot T \cdot \ln (K p)

How to Evaluate Standard Enthalpy of Reaction at Equilibrium?

Standard Enthalpy of Reaction at Equilibrium evaluator uses Change in Enthalpy = (Temperature*Change in Entropy)-(2.303*[R]*Temperature*log10(Equilibrium Constant)) to evaluate the Change in Enthalpy, The Standard enthalpy of reaction at equilibrium formula is defined as the difference in enthalpy between products and reactants of a chemical reaction. Change in Enthalpy is denoted by ΔH symbol.

How to evaluate Standard Enthalpy of Reaction at Equilibrium using this online evaluator? To use this online evaluator for Standard Enthalpy of Reaction at Equilibrium, enter Temperature (T), Change in Entropy (ΔS) & Equilibrium Constant (K_c) and hit the calculate button.

FAQs on Standard Enthalpy of Reaction at Equilibrium

What is the formula to find Standard Enthalpy of Reaction at Equilibrium?

The formula of Standard Enthalpy of Reaction at Equilibrium is expressed as Change in Enthalpy = (Temperature*Change in Entropy)-(2.303*[R]*Temperature*log10(Equilibrium Constant)). Here is an example- 10923.09 = (85*220)-(2.303*[R]*85*log10(60000)).

How to calculate Standard Enthalpy of Reaction at Equilibrium?

With Temperature (T), Change in Entropy (ΔS) & Equilibrium Constant (K_c) we can find Standard Enthalpy of Reaction at Equilibrium using the formula - Change in Enthalpy = (Temperature*Change in Entropy)-(2.303*[R]*Temperature*log10(Equilibrium Constant)). This formula also uses Universal gas constant and Common Logarithm (log10) function(s).

What are the other ways to Calculate Change in Enthalpy?

Here are the different ways to Calculate Change in Enthalpy-

Change in Enthalpy=Gibbs Free Energy+(Temperature*Change in Entropy)
Change in Enthalpy=(2.303*[R]*Initial Temperature at Equilibrium)*((Change in Entropy/(2.303*[R]))-log10(Equilibrium constant 1))
Change in Enthalpy=(2.303*[R]*Final Temperature at Equilibrium)*((Change in Entropy/(2.303*[R]))-log10(Equilibrium constant 2))

Can the Standard Enthalpy of Reaction at Equilibrium be negative?

Yes, the Standard Enthalpy of Reaction at Equilibrium, measured in Heat of Combustion (per Mass) can be negative.

Which unit is used to measure Standard Enthalpy of Reaction at Equilibrium?

Standard Enthalpy of Reaction at Equilibrium is usually measured using the Joule per Kilogram[J/kg] for Heat of Combustion (per Mass). Kilojoule per Kilogram[J/kg], Calorie (IT) per Gram[J/kg] are the few other units in which Standard Enthalpy of Reaction at Equilibrium can be measured.

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Standard Enthalpy of Reaction at Equilibrium Formula

​GoStandard Enthalpy of Reaction given Gibbs Free Energy Formula

​GoStandard Enthalpy at Initial Temperature T1 Formula

Standard Enthalpy of Reaction at Equilibrium Example

Standard Enthalpy of Reaction at Equilibrium Solution

Standard Enthalpy of Reaction at Equilibrium Formula Elements

Other Formulas to find Change in Enthalpy

Other formulas in Thermodynamics in Chemical Equilibrium category

How to Evaluate Standard Enthalpy of Reaction at Equilibrium?

FAQs on Standard Enthalpy of Reaction at Equilibrium

Variable Name

GoStandard Enthalpy of Reaction given Gibbs Free Energy Formula

GoStandard Enthalpy at Initial Temperature T1 Formula