Energy in Chemical Reactions

Practice Questions

Middle School Physical Science › Energy in Chemical Reactions

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1

Screen shot 2020 06 01 at 9.41.52 am

Which of these items is needed to make the light bulb light up?

2

Screen shot 2020 06 01 at 9.41.52 am

Which of these items is needed to make the light bulb light up?

3

What reactant is missing from the beginning of the equation below?

____ + 24F2 --> 8SF6

4

You are doing an experiment where you pour different amounts of hot water into the 200mL of cold water and measure the final temperature. The purpose of a “control” in an experiment is to see what would happen if you did NOT do a test. If we are testing how the volume of warm water effects energy transfer, which cup is our control?

5

You are doing an experiment where you pour different amounts of hot water into the 200mL of cold water and measure the final temperature. The purpose of a “control” in an experiment is to see what would happen if you did NOT do a test. If we are testing how the volume of warm water effects energy transfer, which cup is our control?

6

What reactant is missing from the beginning of the equation below?

____ + 24F2 --> 8SF6

7

In the following equation, what is the missing product?

Zn + 2HCl --> ZnCl2 + ______

8

Jamal wants to make an electrical circuit, but he only has a power source and two wires that are not connected. Which of the following must Jamal also have to make an electrical circuit?

9

Fill in the blank in the statement below:

If more hot water was added to a cup than cold water, the final temperature of the solution would be _________ in comparison to a cup with equal parts cold and hot water.

10

In the following equation, what is the missing product?

Zn + 2HCl --> ZnCl2 + ______

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