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At what temperature T(eq) do the forward n reverse rusting reactions occur at equilibrium?

source : yahoo.com

At what temperature T(eq) do the forward n reverse rusting reactions occur at equilibrium?

When a reaction is at equilibrium, Delta G = 0. Since DG (Delta G) can be calculated from Delta H, Delta S and temperature, you can calculate the temperature:

DG = DH – T(DS)

0 = -1648.4 kJ – T (-543.7 J/K)

(be sure to convert kJ to J, and solve for T)

T = 3032 K

Chapter 19 Flashcards | Quizlet

Chapter 19 Flashcards | Quizlet – This positive value for ΔG means that, at extremely high temperatures, the corrosion reaction will actually go in reverse, converting magnesium oxide into magnesium and oxygen. Teq=5546 K This value means that 5546 K is the temperature at which this reaction changes from product-favored (spontaneous) to reactant-favored (nonspontaneous).USEFUL INFO: The chemical reaction that causes aluminum to corrode in air is given by 4Al + 3O2 –> 2Al2O3 in which DeltaH^"degree symbol" of rxn = -3352 kJ/mol DeltaS^"degree symbol" of rxn = -625.1 J/(mol*K) Part A) What is the standard Gibbs free energy for this reaction? Answer: DeltaG^"degree symbol" of rxn = __(Value)__ __(Units)__ Part B) What is the Gibbs free energy for this reactionThe chemical reaction that causes chromium to corrode in air is given by: in which At what temperature (Teq) do the forward and reverse corrosion reactions occur in equilibrium? Express your answer as an integer and include the appropriate units.

C17: Gibbs Free Energy: Temperature Dependence.? | Yahoo – The variables that determine the state of a system in equilibrium are the concentrations of the reactants and products of chemical reactions, the temperature, and to a lesser extent the pressure. The effect of pressure on an equilibrium involving gases can be confusing if it is not separated from the effects of concentration.At what temperature, Teq, do the forward and reverse corrosion reactions occur in equilibrium? Express your answer as an integer and include the appropriate units. Gibbs Free Energy of a reaction:Solution for . What is the standard Gibbs free energy for this reaction? Assume the commonly used standard reference temperature of 298 K. Express your answer…

C17: Gibbs Free Energy: Temperature Dependence.? | Yahoo

(Get Answer) – The chemical reaction that causes chromium – Problem: The chemical reaction that causes chromium to corrode in air is given by:4Cr + 3O2 → 2Cr2O3In whichΔH°rxn = -2256 kJΔS°rxn = -549.1 J/KAt what temperature (Teq) do the forward and reverse corrosion reactions occur in equilibrium?Express your answer as an integer and include the appropriate units.Part C At what temperature Teq do the forward and reverse corrosion reactions occur in equilibrium? Express your answer as an integer and include the appropriate units. Teq =1. The reaction can proceed in both the forward and reverse directions. 3. When a system has reached equilibrium, no further changes in the reactant and product concentrations occur; the reactions continue to occur, but at equivalent rates. 5. The concept of equilibrium does not imply equal concentrations, though it is possible.

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