Unit 4 Summative Test: Physical and Chemical Changes

Last updated almost 4 years ago

14 questions

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Unit 4 Summative Test: Physical and Chemical Changes

Last updated almost 4 years ago

14 questions

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2

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1

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1

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2

The following reaction is unbalanced: Balance the reaction and then draw a model of the reaction. Be sure to include a key in your model:

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When you get a muscle or joint injury, often you will place an ice pack on the injury. Ice packs work by mixing two room temperature substances in a bag. When those substances mix, they produce a cold temperature.

Is this an endothermic or an exothermic reaction? Explain your answer.

Be sure to include the definition of an endothermic or exothermic reaction in your answer

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2

Using the blank diagram, draw a reaction coordinate diagram for an endothermic reaction.

Label the start or the reaction, end of the reaction, and the point where maximum potential energy is reached.

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Determine the enthalpy change of the following reaction

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Determine the enthalpy change of the following reaction. Then, state whether the reaction is exothermic or endothermic.

Match the item to the correct category of a physical change or chemical reaction.

Salt dissolving in water.
A bicycle chain rusting.
Mixing Ba(OH)2 and NH4Cl and an unexpected odor occurring.
Adding blue food coloring to water and it turning blue.

physical change
chemical change/reaction

Which of the following images best represents a solid?

Determine the change in temperature:

Ms. Ackerman places 12 grams of sodium chloride into 30 mL of water at 27 degrees Celsius. After 30 seconds the temperature of the water is now 18 degrees Celsius.

Change in temperature = final temp - initial temp

How many oxygen (O) atoms are represented in the following chemical formula?

3

4

7

12

The following equation is unbalanced:

Which of the following reaction equations is properly balanced?

The following reaction is unbalanced: Balance the reaction and then draw a model of the reaction. Be sure to include a key in your model:

Which of the following best describes an endothermic reaction?

Endothermic reactions release more energy than they absorb.

Endothermic reactions absorb the same amount of energy that they release.

Endothermic reactions do not release energy.

Endothermic reactions absorb more energy than they release.

Which of the following best describes an exothermic reaction?

Exothermic reactions absorb the same amount of energy that they release.

Exothermic reactions release more energy than they absorb.

Exothermic reactions do not absorb energy.

Exothermic reactions absorb more energy than they release.

This is a reaction coordinate diagram for a chemical reaction. What kind of reaction is represented by this diagram?

exothermic reaction

endothermic reaction

isothermic reaction

When you get a muscle or joint injury, often you will place an ice pack on the injury. Ice packs work by mixing two room temperature substances in a bag. When those substances mix, they produce a cold temperature.

Is this an endothermic or an exothermic reaction? Explain your answer.

Be sure to include the definition of an endothermic or exothermic reaction in your answer

Using the blank diagram, draw a reaction coordinate diagram for an endothermic reaction.

Label the start or the reaction, end of the reaction, and the point where maximum potential energy is reached.

In an exothermic reaction, the temperature of the system will...

not enough information to determine

increase

decrease

stay the same

Determine the enthalpy change of the following reaction

Determine the enthalpy change of the following reaction. Then, state whether the reaction is exothermic or endothermic.

Match the item to the correct category of a physical change or chemical reaction.

Salt dissolving in water.

A bicycle chain rusting.

Mixing Ba(OH)2 and NH4Cl and an unexpected odor occurring.

Adding blue food coloring to water and it turning blue. 

physical change

chemical change/reaction

Which of the following images best represents a solid?

Determine the change in temperature:

Ms. Ackerman places 12 grams of sodium chloride into 30 mL of water at 27 degrees Celsius. After 30 seconds the temperature of the water is now 18 degrees Celsius.

Change in temperature = final temp - initial temp

-9 degrees

-6 degrees

6 degrees

9 degrees

45 degrees

How many oxygen (O) atoms are represented in the following chemical formula?

3

4

7

12

The following equation is unbalanced:

Which of the following reaction equations is properly balanced?

Which of the following best describes an endothermic reaction?

Endothermic reactions release more energy than they absorb.

Endothermic reactions absorb the same amount of energy that they release.

Endothermic reactions do not release energy.

Endothermic reactions absorb more energy than they release.

Which of the following best describes an exothermic reaction?

Exothermic reactions absorb the same amount of energy that they release.

Exothermic reactions release more energy than they absorb.

Exothermic reactions do not absorb energy.

Exothermic reactions absorb more energy than they release.

This is a reaction coordinate diagram for a chemical reaction. What kind of reaction is represented by this diagram?

exothermic reaction

endothermic reaction

isothermic reaction

In an exothermic reaction, the temperature of the system will...

not enough information to determine

increase

decrease

stay the same

Unit 4 Summative Test: Physical and Chemical Changes

Unit 4 Summative Test: Physical and Chemical Changes

The following reaction is unbalanced: Balance the reaction and then draw a model of the reaction. Be sure to include a key in your model:

Using the blank diagram, draw a reaction coordinate diagram for an endothermic reaction.Label the start or the reaction, end of the reaction, and the point where maximum potential energy is reached.

Determine the enthalpy change of the following reaction

Determine the enthalpy change of the following reaction. Then, state whether the reaction is exothermic or endothermic.

Match the item to the correct category of a physical change or chemical reaction.

Which of the following images best represents a solid?

Determine the change in temperature:Ms. Ackerman places 12 grams of sodium chloride into 30 mL of water at 27 degrees Celsius. After 30 seconds the temperature of the water is now 18 degrees Celsius.Change in temperature = final temp - initial temp

How many oxygen (O) atoms are represented in the following chemical formula?

The following equation is unbalanced:Which of the following reaction equations is properly balanced?

The following reaction is unbalanced: Balance the reaction and then draw a model of the reaction. Be sure to include a key in your model:

Which of the following best describes an endothermic reaction?

Which of the following best describes an exothermic reaction?

This is a reaction coordinate diagram for a chemical reaction. What kind of reaction is represented by this diagram?

Using the blank diagram, draw a reaction coordinate diagram for an endothermic reaction.Label the start or the reaction, end of the reaction, and the point where maximum potential energy is reached.

In an exothermic reaction, the temperature of the system will...

Determine the enthalpy change of the following reaction

Determine the enthalpy change of the following reaction. Then, state whether the reaction is exothermic or endothermic.

Using the blank diagram, draw a reaction coordinate diagram for an endothermic reaction.

Label the start or the reaction, end of the reaction, and the point where maximum potential energy is reached.

Determine the change in temperature:

Ms. Ackerman places 12 grams of sodium chloride into 30 mL of water at 27 degrees Celsius. After 30 seconds the temperature of the water is now 18 degrees Celsius.

Change in temperature = final temp - initial temp

The following equation is unbalanced:

Which of the following reaction equations is properly balanced?

Using the blank diagram, draw a reaction coordinate diagram for an endothermic reaction.

Label the start or the reaction, end of the reaction, and the point where maximum potential energy is reached.