Year 8 energy changes in reactions

4

Complete this and then write out the correct answers as notes in your exercise book.

Other Answer Choices:

increases

enters

Escapes

decreases

1

What is the final temperature for reaction B? Write your answer in the table.

5

Classify the variables in this experiment

Chemical used
Temperature change
Mass of chemical reacted
Concentration of chemical reacted
Volume of liquid heated

Independent variable
Dependant variable
Control variable

1

What name is given to reactions that heat the surroundings?

1

Which reaction, A, B, or C, would be best to use in a hand warmer?

1

Give a reason why you chose this reaction.
This reaction had the ____________ change in temperature.

Other Answer Choices:

lowest

highest

3

What measurements would the student make to show that the reaction is exothermic?
Measure the ____________ with a ________________ .
Add the reactants together.
Measure the ____________ temperature with the same ________________ 

Other Answer Choices:

thermometer

maximum

initial

1

How would these measurements show that the reaction is exothermic?
The temperature would _____________ 

Other Answer Choices:

increase

stay the same

decrease

1

The exothermic reaction makes the temperature of the engine

1

This is because during exothermic reactions

1

Which one of the substances shown in the equation is a compound? Give the formula of this compound.

2NO → N2 + O2

2

Why is it important to stop carbon monoxide (CO) from being released into the air?

Carbon monoxide is __________ as it  stops the red blood cells being able to transport ___________ 

Other Answer Choices:

Carbon dioxide

oxygen

Hydrogen

flammable

toxic

Year 8 energy changes in reactions

What is the final temperature for reaction B? Write your answer in the table.

Classify the variables in this experiment

What name is given to reactions that heat the surroundings?

Which reaction, A, B, or C, would be best to use in a hand warmer?

The exothermic reaction makes the temperature of the engine

This is because during exothermic reactions

Which one of the substances shown in the equation is a compound? Give the formula of this compound.2NO → N2 + O2

What is the final temperature for reaction B? Write your answer in the table.

Classify the variables in this experiment

What name is given to reactions that heat the surroundings?

Which reaction, A, B, or C, would be best to use in a hand warmer?

The exothermic reaction makes the temperature of the engine

This is because during exothermic reactions

Which one of the substances shown in the equation is a compound? Give the formula of this compound.2NO → N2 + O2

Which one of the substances shown in the equation is a compound? Give the formula of this compound.

2NO → N2 + O2

Which one of the substances shown in the equation is a compound? Give the formula of this compound.

2NO → N2 + O2