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 of the reaction container.
c. adding a catalyst
d. adding N2
my answer
a. shifts toward products
b. shifts toward reactants
c. change occurs
d. shifts toward reactants
Thanks
Determine the amount of heat (in kJ) given off when 1.26x104 g of
NO2 are produced according to the equation
2 ( ) ( ) 2 ( ) H -114.6kJ/mol 2 2 NO g O g NO g
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Determine the amount of heat (in kJ) given off when 1.26x104 g of
NO2 are produced according to the equation
Your answers are mostly correct. Here's an explanation of each case:
a. Raising the temperature of the reaction:
According to Le Chatelier's principle, increasing the temperature of an exothermic reaction will shift the equilibrium in the direction that consumes heat. In this case, the reaction is exothermic (heat is released when reacting to form products). Thus, raising the temperature will shift the equilibrium toward the reactants, so your answer of "shifts toward products" is incorrect. The correct answer is "shifts toward reactants."
b. Decreasing the volume of the reaction container:
When the volume decreases, the pressure inside the container increases. If the total number of moles of gas in the system is different on the reactant and product side, then changing the volume can affect the equilibrium. In this case, since there are fewer moles of gas on the product side (3 moles) compared to the reactant side (4 moles), decreasing the volume will shift the equilibrium toward the side with fewer moles of gas. Hence, your answer "shifts toward reactants" is correct.
c. Adding a catalyst:
The presence of a catalyst does not affect the position of the equilibrium. A catalyst only speeds up the rate at which the reaction reaches equilibrium, but it does not change the actual equilibrium concentrations. Therefore, the answer "change occurs" is appropriate for this case.
d. Adding N2:
Adding more of a reactant will increase its concentration, leading to a shift in the equilibrium toward the products. In this reaction, adding more N2 will increase its concentration and shift the equilibrium toward the products. Thus, your answer "shifts toward reactants" is incorrect. The correct answer is "shifts toward products."
So, to summarize, the correct answers are:
a. shifts toward reactants
b. shifts toward reactants
c. change occurs
d. shifts toward products