Endothermic and Exothermic Reactions

1.

Multiple Choice

1 min

1 pt

In an exothermic reaction, heat is ...

taken in

given out

2.

Multiple Choice

1 min

1 pt

In an endothermic reaction, heat is ...

taken in

given out

3.

Multiple Choice

1 min

1 pt

If a chemical reaction is EXOTHERMIC, the temperature of the surrounding would....

Stay the same

Increase

Decrease

4.

Multiple Choice

1 min

1 pt

In an endothermic reaction the reaction is releasing energy.

True

False

5.

Multiple Choice

1 min

1 pt

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.

Warm

Cold

6.

Multiple Choice

1 min

1 pt

The illustration shows cell respiration. Is the overall reaction of cell respiration an Endothermic or an Exothermic reaction?

Endothermic

Exothermic

7.

Multiple Choice

1 min

1 pt

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

The temperature did not change.

It is an endothermic reaction

It is an exothermic reaction

Energy is released from the reaction into the surrounding.

8.

Multiple Choice

1 min

1 pt

Baking bread and cooking an egg require an input of heat. These would be examples of....?

Endothermic processes

Exothermic processess

None of these

9.

Multiple Choice

1 min

1 pt

Photosynthesis takes place inside of leaf cells. Sunlight is required. Is this an Exothermic or an Endothermic reaction?

Endothermic

Exothermic

10.

Multiple Choice

1 min

1 pt

What type of reaction is shown in the photo?

Exothermic

Isothermic

Endothermic

None of the above

11.

Multiple Choice

1 min

1 pt

What type of reaction occurs in a hand warmer?

exothermic

endothermic

12.

Multiple Choice

1 min

1 pt

Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?

It is an exothermic reaction

It is an endothermic reaction

It is made of ice

It is dissolving your mouth

13.

Multiple Choice

1 min

1 pt

What instrument would you use to detect an endothermic or exothermic reaction?

triple beam balance

ruler

thermometer

14.

Multiple Choice

1 min

1 pt

Which of the following is a sign that a chemical reaction has occurred?

change in shape

melting

bubbles of gas appear

dissolving

15.

Multiple Choice

1 min

1 pt

During chemical reactions, bonds are...

broken only

formed only

both broken and formed

none of the above are correct

16.

Multiple Choice

1 min

1 pt

It takes energy to ________________ bonds.

break

form

17.

Multiple Choice

1 min

1 pt

Energy is released when bonds are _________________.

Broken

Formed

18.

Multiple Choice

1 min

1 pt

During a particular chemical reaction it takes 100 Kj of energy to break all the bonds and 150 Kj of energy is released when the new bonds form. Which is true about the overall reaction?

It is endothermic and absorbs energy.

It is exothermic and releases 150 Kj

It is exothermic and releases 50 Kj

It is endothermic and releases energy.

19.

Multiple Choice

1 min

1 pt

The bond energy to break a C-H bond is about 400 Kj. How much energy will it take to break all the bonds in methane (CH₄)?

About 800

About 1600

About 3000

Way more than 3000

20.

Multiple Choice

1 min

1 pt

The bond energy in a S=O bond is a little more than 100 Kj. If the molecule SO₂ is made, how much energy is released during the formation of these bonds?

About 50

About 100

About 200

About 400

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