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Gibbs Free Energy given Standard Enthalpy Calculator

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✖Change in enthalpy is the thermodynamic quantity equivalent to the total difference between the heat content of a system.ⓘ Change in Enthalpy [ΔH]			+10% -10%
✖Temperature is the degree or intensity of heat present in a substance or object.ⓘ Temperature [T]			+10% -10%
✖Change in entropy is the thermodynamic quantity equivalent to the total difference between the entropy of a system.ⓘ Change in Entropy [ΔS]			+10% -10%

✖Gibbs Free Energy is a thermodynamic potential that can be used to calculate the maximum of reversible work that may be performed by a thermodynamic system at a constant temperature and pressure.ⓘ Gibbs Free Energy given Standard Enthalpy [G]

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Formula

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Gibbs Free Energy given Standard Enthalpy

Formula

G = ΔH - (T \cdot ΔS)

Example

-18.51 KJ = 190 J/kg - (85 K \cdot 220 J/kg*K)

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Gibbs Free Energy given Standard Enthalpy Solution

STEP 0: Pre-Calculation Summary

Formula Used

Gibbs Free Energy = Change in Enthalpy-(Temperature*Change in Entropy)
G = ΔH-(T*ΔS)
This formula uses 4 Variables

Variables Used

Gibbs Free Energy - (Measured in Joule) - Gibbs Free Energy is a thermodynamic potential that can be used to calculate the maximum of reversible work that may be performed by a thermodynamic system at a constant temperature and pressure.
Change in Enthalpy - (Measured in Joule per Kilogram) - Change in enthalpy is the thermodynamic quantity equivalent to the total difference between the heat content of a system.
Temperature - (Measured in Kelvin) - Temperature is the degree or intensity of heat present in a substance or object.
Change in Entropy - (Measured in Joule per Kilogram K) - Change in entropy is the thermodynamic quantity equivalent to the total difference between the entropy of a system.

STEP 1: Convert Input(s) to Base Unit

Change in Enthalpy: 190 Joule per Kilogram --> 190 Joule per Kilogram No Conversion Required
Temperature: 85 Kelvin --> 85 Kelvin No Conversion Required
Change in Entropy: 220 Joule per Kilogram K --> 220 Joule per Kilogram K No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

G = ΔH-(T*ΔS) --> 190-(85*220)

Evaluating ... ...

G = -18510

STEP 3: Convert Result to Output's Unit

-18510 Joule -->-18.51 Kilojoule (Check conversion here)

FINAL ANSWER

-18.51 Kilojoule <-- Gibbs Free Energy

(Calculation completed in 00.004 seconds)

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Created by Akshada Kulkarni

National Institute of Information Technology (NIIT), Neemrana

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< Thermodynamics in Chemical Equilibrium Calculators

Gibbs Free Energy given Equilibrium Constant due to Pressure

Go Gibbs Free Energy = -2.303*[R]*Temperature*ln(Equilibrium Constant for Partial Pressure)

Temperature of Reaction given Equilibrium Constant and Gibbs Energy

Go Temperature = Gibbs Free Energy/(-2.303*[R]*log10(Equilibrium Constant))

Gibbs Free Energy given Equilibrium Constant

Go Gibbs Free Energy = -2.303*[R]*Temperature*log10(Equilibrium Constant)

Equilibrium constant given Gibbs free energy

Go Equilibrium Constant = 10^(-(Gibbs Free Energy/(2.303*[R]*Temperature)))

Gibbs Free Energy given Standard Enthalpy Formula

Gibbs Free Energy = Change in Enthalpy-(Temperature*Change in Entropy)
G = ΔH-(T*ΔS)

What is Gibbs free energy?

In thermodynamics, the Gibbs free energy is a thermodynamic potential that can be used to calculate the maximum reversible work that may be performed by a thermodynamic system at a constant temperature and pressure. This maximum can be attained only in a completely reversible process.

How equilibrium constant with respect to the Gibbs free energy?

1. When ΔG0 = 0, then, Kc = 1

2. When, ΔG0 > 0, i.e. positive, then Kc < 1, in this case reverse reaction is feasible showing thereby a less concentration of products at equilibrium rate.

3. When ΔG0 < 0, i.e. negative, then, Kc > 1; In this case, forward reaction is feasible showing thereby a large concentrations of product at equilibrium state.

How to Calculate Gibbs Free Energy given Standard Enthalpy?

Gibbs Free Energy given Standard Enthalpy calculator uses Gibbs Free Energy = Change in Enthalpy-(Temperature*Change in Entropy) to calculate the Gibbs Free Energy, The Gibbs free energy given standard enthalpy formula is defined as the difference in free energy of the reaction when all the reactants and products are in the standard state and Kc or, Kp be the thermodynamic equilibrium constant of the reaction. Gibbs Free Energy is denoted by G symbol.

How to calculate Gibbs Free Energy given Standard Enthalpy using this online calculator? To use this online calculator for Gibbs Free Energy given Standard Enthalpy, enter Change in Enthalpy (ΔH), Temperature (T) & Change in Entropy (ΔS) and hit the calculate button. Here is how the Gibbs Free Energy given Standard Enthalpy calculation can be explained with given input values -> -0.01851 = 190-(85*220).

FAQ

What is Gibbs Free Energy given Standard Enthalpy?

The Gibbs free energy given standard enthalpy formula is defined as the difference in free energy of the reaction when all the reactants and products are in the standard state and Kc or, Kp be the thermodynamic equilibrium constant of the reaction and is represented as G = ΔH-(T*ΔS) or Gibbs Free Energy = Change in Enthalpy-(Temperature*Change in Entropy). Change in enthalpy is the thermodynamic quantity equivalent to the total difference between the heat content of a system, Temperature is the degree or intensity of heat present in a substance or object & Change in entropy is the thermodynamic quantity equivalent to the total difference between the entropy of a system.

How to calculate Gibbs Free Energy given Standard Enthalpy?

The Gibbs free energy given standard enthalpy formula is defined as the difference in free energy of the reaction when all the reactants and products are in the standard state and Kc or, Kp be the thermodynamic equilibrium constant of the reaction is calculated using Gibbs Free Energy = Change in Enthalpy-(Temperature*Change in Entropy). To calculate Gibbs Free Energy given Standard Enthalpy, you need Change in Enthalpy (ΔH), Temperature (T) & Change in Entropy (ΔS). With our tool, you need to enter the respective value for Change in Enthalpy, Temperature & Change in Entropy and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Gibbs Free Energy?

In this formula, Gibbs Free Energy uses Change in Enthalpy, Temperature & Change in Entropy. We can use 2 other way(s) to calculate the same, which is/are as follows -

Gibbs Free Energy = -2.303*[R]*Temperature*log10(Equilibrium Constant)
Gibbs Free Energy = -2.303*[R]*Temperature*ln(Equilibrium Constant for Partial Pressure)

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