## Gibbs Free Energy Solution

STEP 0: Pre-Calculation Summary
Formula Used
Gibbs Free Energy = Enthalpy-(Temperature*Entropy)
G = H-(Tg*S)
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.
Enthalpy - (Measured in Joule) - Enthalpy is the thermodynamic quantity equivalent to the total heat content of a system.
Temperature - (Measured in Kelvin) - Temperature is the degree or intensity of heat present in a substance or object.
Entropy - (Measured in Joule per Kelvin) - Entropy is the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work.
STEP 1: Convert Input(s) to Base Unit
Enthalpy: 0.3 Kilojoule --> 300 Joule (Check conversion here)
Temperature: 85 Kelvin --> 85 Kelvin No Conversion Required
Entropy: 16.8 Joule per Kelvin --> 16.8 Joule per Kelvin No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
G = H-(Tg*S) --> 300-(85*16.8)
Evaluating ... ...
G = -1128
STEP 3: Convert Result to Output's Unit
-1128 Joule -->-1.128 Kilojoule (Check conversion here)
-1.128 Kilojoule <-- Gibbs Free Energy
(Calculation completed in 00.000 seconds)
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## Credits

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Softusvista Office (Pune), India
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Verified by Himanshi Sharma
Bhilai Institute of Technology (BIT), Raipur
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## < 11 Gibbs Free Energy Calculators

Moles of Electron Transferred given Standard Change in Gibbs Free Energy
Moles of Electron Transferred = -(Standard Gibbs Free Energy)/([Faraday]*Standard Cell Potential)
Standard Cell Potential given Standard Change in Gibbs Free Energy
Standard Cell Potential = -(Standard Gibbs Free Energy)/(Moles of Electron Transferred*[Faraday])
Standard Change in Gibbs Free Energy given Standard Cell Potential
Standard Gibbs Free Energy = -(Moles of Electron Transferred)*[Faraday]*Standard Cell Potential
Electrode Potential given Gibbs Free Energy
Electrode Potential = -Gibbs Free Energy Change/(Number of Moles of Electron*[Faraday])
Cell Potential given Change in Gibbs Free Energy
Cell Potential = -Gibbs Free Energy Change /(Moles of Electron Transferred*[Faraday])
Gibbs Free Energy Change
Gibbs Free Energy Change = -Number of Moles of Electron*[Faraday]/Electrode Potential
Moles of Electron Transferred given Change in Gibbs Free Energy
Moles of Electron Transferred = (-Gibbs Free Energy)/([Faraday]*Cell Potential)
Change in Gibbs Free Energy given Cell Potential
Gibbs Free Energy = (-Moles of Electron Transferred*[Faraday]*Cell Potential)
Gibbs Free Energy
Gibbs Free Energy = Enthalpy-(Temperature*Entropy)
Gibbs Free Energy given Gibbs Free Entropy
Gibbs Free Energy = (-Gibbs Free Entropy*Temperature)
Change in Gibbs Free Energy given Electrochemical Work
Gibbs Free Energy = -(Work Done)

## < 11 Basics of Manufacturing Calculators

Coefficient of Friction using forces
Coefficient of Friction = (Centripetal Force*tan(Angle of friction)+Tangential Force)/(Centripetal Force-Tangential Force*tan(Angle of friction))
Total Minimum Cost
Total Minimum Cost = (Min. Cost/((Tool Cost/Machine Cost+Tool Changing Time)*(1/Number Of Rotations-1))^Number Of Rotations)
Volumetric Removal Rate in electrochemical machining
Volumetric Removal Rate = Atomic Weight*Current Value/(Density of material*Valency*96500)
Electro Discharge Machining
Electro Discharge Machining = Voltage*(1-e^(-Time/(Resistance*Capacitance)))
Bend Allowance
Extrusion and Wire drawing
Extrusion and Wire Drawing = Stretch Factor*ln(Ratio of Area)
Gibbs Free Energy
Gibbs Free Energy = Enthalpy-(Temperature*Entropy)
Coefficient of Friction
Coefficient of Friction = Limiting Force/Normal Reaction
Atomic Packing Factor Percentage
Atomic Packing Factor Percentage = Atomic Packing Factor*100
Maximum Convexity
Convexity = ((0.1*(Fillet Weld Size/0.001))+0.762)*0.001
Diameter of Nugget
Diameter Of Nugget = 6*(Thickness)^1/2

## Gibbs Free Energy Formula

Gibbs Free Energy = Enthalpy-(Temperature*Entropy)
G = H-(Tg*S)

## What is Gibbs Free Energy?

Gibbs energy was developed in the 1870’s by Josiah Willard Gibbs. He originally termed this energy as the “available energy” in a system. His paper published in 1873, “Graphical Methods in the Thermodynamics of Fluids,” outlined how his equation could predict the behavior of systems when they are combined. Denoted by G, Gibbs Free Energy combines enthalpy and entropy into a single value. The sign of ΔG indicates the direction of a chemical reaction and determine if a reaction is spontaneous or not. When ΔG<0 : reaction is spontaneous in the direction written (i.e., the reaction is exergonic), when ΔG=0 : the system is at equilibrium and there is no net change either in forward or reverse direction and when ΔG>0 : reaction is not spontaneous and the process proceeds spontaneously in the reserve direction.

## How to Calculate Gibbs Free Energy?

Gibbs Free Energy calculator uses Gibbs Free Energy = Enthalpy-(Temperature*Entropy) to calculate the Gibbs Free Energy, 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 is denoted by G symbol.

How to calculate Gibbs Free Energy using this online calculator? To use this online calculator for Gibbs Free Energy, enter Enthalpy (H), Temperature (Tg) & Entropy (S) and hit the calculate button. Here is how the Gibbs Free Energy calculation can be explained with given input values -> -1128 = 300-(85*16.8).

### FAQ

What is Gibbs Free Energy?
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 and is represented as G = H-(Tg*S) or Gibbs Free Energy = Enthalpy-(Temperature*Entropy). Enthalpy is the thermodynamic quantity equivalent to the total heat content of a system, Temperature is the degree or intensity of heat present in a substance or object & Entropy is the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work.
How to calculate Gibbs Free Energy?
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 is calculated using Gibbs Free Energy = Enthalpy-(Temperature*Entropy). To calculate Gibbs Free Energy, you need Enthalpy (H), Temperature (Tg) & Entropy (S). With our tool, you need to enter the respective value for Enthalpy, Temperature & Entropy and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well. Let Others Know