Equilibrium Constant: H2+O2->H2O

In summary, when the equation H2+1/2 O2 ---------> H20 is multiplied by 2, the resulting equilibrium constant will also be multiplied by 2, but this will not affect any intensive or molar quantity.
  • #1
Entanglement
439
13
H2+1/2 O2 ---------> H20

If the equation is multiplied by 2
Will the equilibrium constant change or remain constant ?
 
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  • #2
The square of a constant is still a constant.
 
  • #3
Useful nucleus said:
The square of a constant is still a constant.
Sorry, I don't understand, can you clarify what you mean, thanks.
 
  • #4
Equilibrium constant will change, but as it will describe different reaction equation, you will find when the correct combination of the equation and constant is used, results of equilibrium calculations are identical.
 
  • #5
ElmorshedyDr said:
Sorry, I don't understand, can you clarify what you mean, thanks.
Suppose you calculate a constant for the above reaction and its value is K. If you multiply the equation by 2, then the new constant will be K2 .

But this should not matter for any intensive or molar quantity.
 

1. What is the equilibrium constant for the reaction H2+O2->H2O?

The equilibrium constant for this reaction is the ratio of the concentrations of the products (H2O) to the concentrations of the reactants (H2 and O2) at equilibrium. It is denoted by the symbol Keq.

2. How is the equilibrium constant calculated?

The equilibrium constant can be calculated by dividing the equilibrium concentrations of the products by the equilibrium concentrations of the reactants, with each concentration raised to the power of its coefficient in the balanced chemical equation. For this reaction, the equilibrium constant expression would be Keq = [H2O] / ([H2] x [O2]).

3. What is the significance of the equilibrium constant?

The equilibrium constant tells us the extent to which a reaction will proceed towards products or reactants at equilibrium. If the equilibrium constant is large, it means the reaction will favor the products. If the equilibrium constant is small, the reaction will favor the reactants. A value of Keq = 1 indicates that the reactants and products are present in equal amounts at equilibrium.

4. How does the equilibrium constant change with temperature?

The equilibrium constant is temperature-dependent. As the temperature increases, the equilibrium constant also increases for endothermic reactions (reactions that absorb heat) and decreases for exothermic reactions (reactions that release heat). This is because changes in temperature affect the equilibrium position of a reaction.

5. Can the equilibrium constant be altered?

The equilibrium constant is a constant for a given reaction at a specific temperature. It can be altered by changing the temperature or pressure of the system, or by adding or removing reactants or products. However, the equilibrium constant itself cannot be changed by any external factor.

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