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Using this reversible reaction, answer the following:
N2O4 <--> 2NO2
(colorless) (reddish-brown)

-As the temperature increased, what happened to the [N2O4]?

-Was the formation of reactants or products favored by the addition of heat?

-Which reaction is exothermic?

-If the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct?


N2O4 <--> 2NO2 + 14 kcal
N2O4 <--> 2NO2, HR = +14 kcal
N2O4 + 14 kcal <--> 2NO2
N2O4 <--> 2NO2, HR = -14 kcal

Using this reversible reaction answer the following N2O4 ltgt 2NO2 colorless reddishbrown As the temperature increased what happened to the N2O4 Was the formati class=

Respuesta :

yasminwhitehead
-Products formed by the forward 
reaction may react with each other to regenerate the reactants. 
-When reactants are mixed, they will begin to react at a forward reaction rate particular to that chemical reaction. 
- As reactants are depleted and products are formed, however, the rate of the forward reaction begins to slow, and the rate of the reverse reaction begins to increase.
zainebamir540

Question 1.

Answer:

The concentration of [N2O4] will decrease.

Explanation:

  • As the reverse reaction which is the formation of N2O4 is an exothermic reaction and the formation of NO2 is an endothermic reaction.
  • Hence heating will favor the forward reaction and stops the reverse reaction.
  • N2O4 --> 2NO2
  • So the concentration of N2O4 decreases.

Question: 2.

Answer:

The formation of the products is favored by the addition of heat.

Explanation:

  • As the reverse reaction which is the formation of N2O4 is an exothermic reaction and the formation of NO2 is an endothermic reaction.
  • So the addition of heat will favor endothermic reaction.
  • Hence the formation of NO2 will be favored which is a product.

Question no.4:

Answer:

The reverse reaction is an exothermic reaction.

N2O4 <-- 2NO2.

Explanation:

  • N2O4 which is a reactant in this reaction is colorless compound.
  • Its breakdown absorbs energy and its formation release energy in form of heat.
  • So the reverse reaction which releases energy is an exothermic reaction.

Question no. 4

Answer:

The correct option is D which is N2O4 <--> 2NO2, HR = -14 kcal.

Explanation:

  • Enthalpy is the change in energy in reactants and products.
  • It is actually the difference in energies of products and reactant.
  • As the enthalpy change from left to right, it means reactants have internal energy 14 kcal high than products and it will be released.
  • And in option D which is shown as HR = -14 kcal.

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