Standard Enthalpy of Reaction given Gibbs Free Energy Solution

STEP 0: Pre-Calculation Summary
Formula Used
Change in Enthalpy = Gibbs Free Energy+(Temperature*Change in Entropy)
ΔH = G+(T*ΔS)
This formula uses 4 Variables
Variables Used
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.
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.
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
Gibbs Free Energy: 0.22861 Kilojoule --> 228.61 Joule (Check conversion here)
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
ΔH = G+(T*ΔS) --> 228.61+(85*220)
Evaluating ... ...
ΔH = 18928.61
STEP 3: Convert Result to Output's Unit
18928.61 Joule per Kilogram --> No Conversion Required
FINAL ANSWER
18928.61 Joule per Kilogram <-- Change in Enthalpy
(Calculation completed in 00.020 seconds)

Credits

Created by Akshada Kulkarni
National Institute of Information Technology (NIIT), Neemrana
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25 Thermodynamics in Chemical Equilibrium Calculators

Equilibrium Constant 2 in Temperature Range T1 and T2
Go Equilibrium constant 2 = Equilibrium constant 1*exp((Change in Enthalpy/[R])*((Final Temperature at Equilibrium-Initial Temperature at Equilibrium)/(Initial Temperature at Equilibrium*Final Temperature at Equilibrium)))
Equilibrium Constant 1 in Temperature Range T1 and T2
Go Equilibrium constant 1 = Equilibrium constant 2/exp((Change in Enthalpy/[R])*((Final Temperature at Equilibrium-Initial Temperature at Equilibrium)/(Initial Temperature at Equilibrium*Final Temperature at Equilibrium)))
Standard Enthalpy at Initial Temperature T1
Go Change in Enthalpy = (2.303*[R]*Initial Temperature at Equilibrium)*((Change in Entropy/(2.303*[R]))-log10(Equilibrium constant 1))
Standard Enthalpy at Final Temperature T2
Go Change in Enthalpy = (2.303*[R]*Final Temperature at Equilibrium)*((Change in Entropy/(2.303*[R]))-log10(Equilibrium constant 2))
Standard Entropy Change at Final Temperature T2
Go Change in Entropy = (2.303*[R])*(Change in Enthalpy/(2.303*[R]*Final Temperature at Equilibrium)+log10(Equilibrium constant 2))
Standard Enthalpy of Reaction at Equilibrium
Go Change in Enthalpy = (Temperature*Change in Entropy)-(2.303*[R]*Temperature*log10(Equilibrium Constant))
Standard Entropy Change at Equilibrium
Go Change in Entropy = (Change in Enthalpy+(2.303*[R]*Temperature*log10(Equilibrium Constant)))/Temperature
Equilibrium Constant at Initial Temperature T1
Go Equilibrium constant 1 = 10^((-Change in Enthalpy/(2.303*[R]*Initial Temperature at Equilibrium))+(Change in Entropy/(2.303*[R])))
Equilibrium Constant at Final Temperature T2
Go Equilibrium constant 2 = 10^((-Change in Enthalpy/(2.303*[R]*Final Temperature at Equilibrium))+Change in Entropy/(2.303*[R]))
Standard Entropy Change at Initial Temperature T1
Go Change in Entropy = (2.303*[R]*log10(Equilibrium constant 1))+(Change in Enthalpy/Initial Temperature at Equilibrium)
Equilibrium Constant at Equilibrium
Go Equilibrium Constant = 10^((-Change in Enthalpy+(Change in Entropy*Temperature))/(2.303*[R]*Temperature))
Equilibrium Constant due to Pressure Given Gibbs Energy
Go Equilibrium Constant for Partial Pressure = exp(-(Gibbs Free Energy/(2.303*[R]*Temperature)))
Temperature of Reaction given Equilibrium Constant of Pressure and Gibbs Energy
Go Temperature = Gibbs Free Energy/(-2.303*[R]*ln(Equilibrium Constant for Partial Pressure))
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 at Equilibrium given Gibbs Energy
Go Equilibrium Constant = exp(-(Gibbs Free Energy/([R]*Temperature)))
Equilibrium constant given Gibbs free energy
Go Equilibrium Constant = 10^(-(Gibbs Free Energy/(2.303*[R]*Temperature)))
Temperature of Reaction given Standard Enthalpy and Entropy Change
Go Temperature = (Change in Enthalpy-Gibbs Free Energy)/Change in Entropy
Standard Enthalpy of Reaction given Gibbs Free Energy
Go Change in Enthalpy = Gibbs Free Energy+(Temperature*Change in Entropy)
Standard Entropy Change given Gibbs Free Energy
Go Change in Entropy = (Change in Enthalpy-Gibbs Free Energy)/Temperature
Gibbs Free Energy given Standard Enthalpy
Go Gibbs Free Energy = Change in Enthalpy-(Temperature*Change in Entropy)
Gibbs Energy of Reactants
Go Gibbs Free Energy Reactants = Gibbs Free Energy Products-Gibbs Free Energy Reaction
Gibbs Energy of Reaction
Go Gibbs Free Energy Reaction = Gibbs Free Energy Products-Gibbs Free Energy Reactants
Gibbs Energy of Products
Go Gibbs Free Energy Products = Gibbs Free Energy Reaction+Gibbs Free Energy Reactants

Standard Enthalpy of Reaction given Gibbs Free Energy Formula

Change in Enthalpy = Gibbs Free Energy+(Temperature*Change in Entropy)
ΔH = G+(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 Standard Enthalpy of Reaction given Gibbs Free Energy?

Standard Enthalpy of Reaction given Gibbs Free Energy calculator uses Change in Enthalpy = Gibbs Free Energy+(Temperature*Change in Entropy) to calculate the Change in Enthalpy, The Standard enthalpy of reaction given Gibbs free energy 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 calculate Standard Enthalpy of Reaction given Gibbs Free Energy using this online calculator? To use this online calculator for Standard Enthalpy of Reaction given Gibbs Free Energy, enter Gibbs Free Energy (G), Temperature (T) & Change in Entropy (ΔS) and hit the calculate button. Here is how the Standard Enthalpy of Reaction given Gibbs Free Energy calculation can be explained with given input values -> 18928.61 = 228.61+(85*220).

FAQ

What is Standard Enthalpy of Reaction given Gibbs Free Energy?
The Standard enthalpy of reaction given Gibbs free energy formula is defined as the difference in enthalpy between products and reactants of a chemical reaction and is represented as ΔH = G+(T*ΔS) or Change in Enthalpy = Gibbs Free Energy+(Temperature*Change in Entropy). 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, 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 Standard Enthalpy of Reaction given Gibbs Free Energy?
The Standard enthalpy of reaction given Gibbs free energy formula is defined as the difference in enthalpy between products and reactants of a chemical reaction is calculated using Change in Enthalpy = Gibbs Free Energy+(Temperature*Change in Entropy). To calculate Standard Enthalpy of Reaction given Gibbs Free Energy, you need Gibbs Free Energy (G), Temperature (T) & Change in Entropy (ΔS). With our tool, you need to enter the respective value for Gibbs Free Energy, 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 Change in Enthalpy?
In this formula, Change in Enthalpy uses Gibbs Free Energy, Temperature & Change in Entropy. We can use 3 other way(s) to calculate the same, which is/are as follows -
  • Change in Enthalpy = (Temperature*Change in Entropy)-(2.303*[R]*Temperature*log10(Equilibrium Constant))
  • 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))
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