The Nernst equation and the link between the standard cell potential and free energy can be used to determine the equilibrium constant of the redox process in an electrochemical cell.
The ratio of the product concentration to the reactant concentration is the equilibrium constant. a fixed value for a certain reaction at a specific temperature. The letter "c" denotes the expression of the equilibrium constant in terms of concentrations.
The standard cell potential, temperature, reaction quotient, and the cell potential of an electrochemical cell are all related by the Nernst equation. The Nernst equation can be used to determine the cell potentials of electrochemical cells even under unusual circumstances.
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Find the volume, in mL, of an object whose density is 400 g/mL and has a mass of 600
mg.
The volume of the object is 1.5ml.
What is the volume of an object?This refers to the space occupied within the boundaries of an object in three-dimensional space. It is also called the capacity of the object.
In the question:
ρ = 400 g/mL
m = 600 mg
v = ?
Formular for calculating density ρ:
ρ = m/v
Where,
ρ= Density of the object
m= Mass of the object
v = volume of the object
Were are given the values of density and mass in the question. We are to calculate the volume.
Makinig v subject of the formular we have:
v = m/ρ
v = 600 mg
400 g/mL
v = 1.5ml
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Identify the options below that are results of decreasing the temperature of a system that includes an exothermic reaction in the forward direction. A. The concentration of the reactants increases. B. The concentration of the products increases. C. The equilibrium constant decreases. D. The equilibrium shifts toward the products.
If the reaction is exothermic as described, a rise in temperature will thus trigger the opposite reaction, which will result in a decrease in the amount of the products and an increase in the number of reactants. The reverse outcome will occur if the temperature is lowered.
B. The concentration of the products increases.
A reaction is defined as exothermic if the overall standard enthalpy change (H) is negative. Exothermic processes typically produce heat. Exergonic reaction, which the IUPAC defines as "... a reaction for which the overall standard Gibbs energy change G is negative," is frequently mistaken with the phrase.
Because "H" contributes significantly to "G," a strongly exothermic process is typically also exergonic. Exothermic and exergonic chemical reactions make up the majority of the impressive demonstrations in schools.
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