1 of 11 of 1 Items

Question

1 of 11 of 1 Items
Question 1

Carbon monoxide and oxygen combine to produce carbon dioxide. The total bond energy of the products is 1,472 kJ. The bond energy of each carbon-oxygen double bond in carbon dioxide is:

(1 point)
Responses

2,944 kJ
2,944 kJ

736 kJ
736 kJ

1,472 kJ
1,472 kJ

368 kJ
368 kJ
Question 2

Which statement about the change in bond energy of this reaction is correct?

(1 point)
Responses

The reaction is endothermic because the energy of each bond in the reactants is less than the energy of a bond in the products.
The reaction is endothermic because the energy of each bond in the reactants is less than the energy of a bond in the products.

The reaction is exothermic because the total bond energy of the reactants is less than the total bond energy of the products.
The reaction is exothermic because the total bond energy of the reactants is less than the total bond energy of the products.

The reaction is endothermic because the total bond energy of the reactants is greater than the total bond energy of the products.
The reaction is endothermic because the total bond energy of the reactants is greater than the total bond energy of the products.

The reaction is exothermic because the energy of each bond in the reactants is greater than the energy of a bond in the products.
The reaction is exothermic because the energy of each bond in the reactants is greater than the energy of a bond in the products.
Question 3

A chemist is performing a chemical reaction under a fume hood. The chemist has a set of beakers, flasks, and tubes set up under the fume hood, with various liquids being combined inside the glass containers. The fume hood is turned on in order to withdraw any toxic gases and expel them outside the building.

Which part of this system is designated as the chemical reaction system?

(1 point)
Responses

the glass containers
the glass containers

liquid contents of the glass containers
liquid contents of the glass containers

inside the fume hood
inside the fume hood

outside of the building
outside of the building
Question 4
In order to break water apart into hydrogen and oxygen, water is heated to more than 350ºC. Which kind of reaction is this and why?(1 point)
Responses

It is exothermic because heat needs to be released by the reactants to form the products.
It is exothermic because heat needs to be released by the reactants to form the products.

It is endothermic because heat needs to be absorbed by the reactants to form the products.
It is endothermic because heat needs to be absorbed by the reactants to form the products.

It is endothermic because heat needs to be released by the reactants to form the products.
It is endothermic because heat needs to be released by the reactants to form the products.

It is exothermic because heat needs to be absorbed by the reactants to form the products.
It is exothermic because heat needs to be absorbed by the reactants to form the products.
Question 5

On an energy graph, the length of the vertical lines represents:

(1 point)
Responses

the amount of released or absorbed energy.
the amount of released or absorbed energy.

whether energy is released or absorbed.
whether energy is released or absorbed.

the number of reactant and product atoms.
the number of reactant and product atoms.

the number of atoms in the activated complex.
the number of atoms in the activated complex.
Question 6
(1 point)
Responses

The reactants would appear at a higher energy state than the products.
The reactants would appear at a higher energy state than the products.

The reactants and products would appear at a high energy state.
The reactants and products would appear at a high energy state.

The reactants would appear at a lower energy state than the products.
The reactants would appear at a lower energy state than the products.

The reactants and products would appear at a low energy state.
The reactants and products would appear at a low energy state.
Question 7

GPT-4o mini · Answer

Here are the answers to your questions based on the provided information:

Question 1:
The bond energy of each carbon-oxygen double bond in carbon dioxide is:
Answer: 736 kJ
(Explanation: In carbon dioxide, there are two carbon-oxygen double bonds, so the total bond energy of 1,472 kJ is divided by 2, yielding 736 kJ per bond.)

Question 2:
Which statement about the change in bond energy of this reaction is correct?
Answer: The reaction is exothermic because the total bond energy of the reactants is greater than the total bond energy of the products.
(Explanation: If the total bond energy of the products is less than that of the reactants, the reaction releases energy, indicating it is exothermic.)

Question 3:
Which part of this system is designated as the chemical reaction system?
Answer: liquid contents of the glass containers
(Explanation: The chemical reaction system refers specifically to the substances that are reacting, which are the liquids in the containers.)

Question 4:
In order to break water apart into hydrogen and oxygen, water is heated to more than 350ºC. Which kind of reaction is this and why?
Answer: It is endothermic because heat needs to be absorbed by the reactants to form the products.
(Explanation: Endothermic reactions require heat input to proceed; in this case, heat is required to break the bonds in water.)

Question 5:
On an energy graph, the length of the vertical lines represents:
Answer: the amount of released or absorbed energy.
(Explanation: In energy graphs, vertical line lengths indicate the quantity of energy changes during the reaction.)

Question 6:
The reactants would appear at a higher energy state than the products.
Answer: The reactants would appear at a higher energy state than the products.
(Explanation: In exothermic reactions, the reactants typically have higher energy than the products, as energy is released during the reaction.)

If you have any further questions or need clarification on any topic, feel free to ask!