Equilibrium constant reaction problem

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Discussion Overview

The discussion revolves around a homework problem related to calculating the equilibrium constant for a reaction involving the conversion of reactants to products and vice versa. Participants explore the implications of the equilibrium constant when the reaction is reversed and how changes in stoichiometry affect the calculation.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant states that since the reaction is the inverse, the equilibrium constant K2 should be calculated as 1/K1.
  • Another participant mentions that the mole ratio of the substances is halved, leading to a question about why this necessitates taking the square root of K1.
  • A different participant asks for a theoretical explanation to clarify the reasoning behind the square root adjustment.
  • Another suggestion is made to write the expression for the equilibrium constant for both reactions and substitute K2 into the expression for K1.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the relationship between the stoichiometry of the reaction and the calculation of the equilibrium constant, indicating that there is no consensus on the reasoning behind the square root adjustment.

Contextual Notes

There are unresolved questions about the theoretical justification for the calculations and the implications of changing the stoichiometry on the equilibrium constant.

ahoy hoy
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Homework Statement



Given the equilibrium,
A2(g) + 4C(g) 2AC2(g), K1 = 4.8

It follows that, for the reaction,
AC2(g) A2(g) + 2C(g), K2 = X

X would be

Homework Equations





The Attempt at a Solution


Since the equation is the inverse, i know to use 1/K1.
The mole ratio of everything is halved- why does this mean taking the square root of K1, considering the solution to x is 1/(sqrt4.8).
I woulda just gone for the other multiple choice option 1/2.4
 
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yeah you have to take sq root of the inverse.
 
but why...could u relate it to theory?
 
write the expression for eq const for reaction 1 and 2 and subtitute k2 in the exp for k1
 

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