Interpretation:
From the given total pressure, partial pressure of each gas has to be found out.
Concept introduction:
Calculation of equilibrium concentration from initial concentration:
- The balanced equation for given reaction has to be written.
- Set up an equilibrium table to calculate x value
- The value of x is solved by substituting concentrations of chemical species in equilibrium constant expression.
- The concentration of chemical species at equilibrium is calculated from value of x
Equilibrium constant
In gas phase reactions, partial pressure is used to write equilibrium equation than molar concentration. Equilibrium constant
Consider the reaction where A reacts to give B.
On rearranging,
Where,
The pressure of each species of ideal gas and its molar concentration are directly proportional to each other.
In same way
Where,
R is gas constant
T is absolute temperature
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General Chemistry: Atoms First
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