Chemistry

posted by .

I'm reviewing for a test and I'm on Le Chatelier's principle. Decreasing the temperature of an exothermic reaction shifts the equilibrium to the right?
I understood this weeks ago but now I can't remember.
Wouldn't decreasing the temperature cause there to be less collisions between reactants? Because in an exothermic reaction, reactants have more energy? (the products' collisions will be lessened too, but wouldn't it be more significant for the reactants since they have more energy?) So less collisions between reactants means the rate of the reverse reaction will Be less than the rate of the forward reaction, so the equilibrium system will shift to the left and produce more reactants to reastablish equilibrium?
I know that's wrong but that's what I think right now so I would really appreciate an explanation, I'm pretty confused.

  • Chemistry -

    You're making it far too complicated.
    A + B ==> C + heat.
    That's an exothermic reaction since heat is emitted. Since a system in equilibrium will try to undo what we do to it, if we ADD heat, the reaction will shift so as to try to use up the added heat. If it shifts to the right more heat is released. Hardly what we're looking for. If it shifts to the left heat is used. So it shifts to the left.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    Could someone explain Le Chatelier's principle to me?
  2. chemistry

    RE: Le Chatelier's principle. this was the whole question i was given. Write a short account of around 250 words in total, with reference to Le Chatelier’s principle, in which you explain the following: (i) The effect on the equilibrium …
  3. chemistry

    . For the gas reaction at low pressure 2NOBr ↔ 2NO + Br2 ΔH = +61.1 kJ which of the following statements are true?
  4. Chemistry

    . For the gas reaction at low pressure 2NOBr ¡ê 2NO + Br2 ¥ÄH = +61.1 kJ which of the following statements are true?
  5. Chemistry Eq. Question

    3H2(g) + N2(g) reverse reaction arrow 2NH3(g) What factors would affect the equilibrium constant for the reaction above?
  6. Chemistry

    is this right Consider the following reaction at equilibrium N2(g) + O2(g) + heat < = > 2NO(g) Indicate how each of the following will shift the equilibrium a. raising the temperature of the reaction. b. decreasing the volume …
  7. Chem

    did I do this right Consider the following reaction at equilibrium N2(g) + O2(g) + heat < = > 2NO(g) Indicate how each of the following will shift the equilibrium a. raising the temperature of the reaction. b. decreasing the …
  8. Check my answers? (Chemistry)

    I only get one chance for each of these questions so I was wondering if someone could check my answers, thanks! 1. Consider the following reaction at equilibrium. 2 BrNO(g) ---> 2 NO(g) + Br2(g) Predict the effect of the following …
  9. chemistry

    a. what is the effect on the Kc when the temperature of an exothermic reaction is lowered?
  10. AP Chemistry

    Hey guys! Stuck on some problems: 1)Consider the following chemical reaction between gases: 2N2O(g) + O2(g)->4NO(g) + heat The amount of O2 at equilibrium will be decreased by: 1. Adding more NO(g). 2. Increasing the pressure by …

More Similar Questions