Chem checkpoint 7 review

Which of the following describes the particles in an ideal gas? (Select TWO correct answers.)

• The particles do not have attractive forces on each other.

• The particles have attractive forces on each other.

• The particles move in a random motion.

• The particles move in an orderly pattern.

• The particles decrease the energy of the system when they collide.

TEMPERATURE is a measure of what?

• How cold it is

• Heat energy

• Kinetic Energy

• nothing

Which graph in the picture shows how pressure and volume are related to each other?

• Graph A

• Graph B

• Graph C

• Graph D

The pressure of a sample of dry air is 2.25 atm, while the temperature remains constant. The original volume of the sample is 43 L. Which of the following is closest to the final volume of the sample if the final pressure reached 3 atm?

• 3.0 L

• 32 L

• 57 L

• 610 L

A sealed container holds a mixture of three gases: A, B and C. The total pressure inside the container is 850 mmHg. The partial pressure of A is 200 mmHg, and the partial pressure of C is 400 mmHg. What is the partial pressure of B in the container?

• 250 mmHg

• 850 mmHg

• 100 mmHg

• 400 mmHg

What type of reaction is the following reaction:

CaCl₂ + 2H₂O → Ca(OH)2 + 2HCl + heat

• Neutral reaction

• Exothermic reaction

• Endothermic reaction

• not a reaction

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

What type of reaction is the following reaction:

HEAT + Vinegar + Baking soda --> Water + CO₂ and vinegar salt

• Neutral reaction

• Exothermic reaction

• Endothermic reaction

• not a reaction

Tags

NGSS.HS-PS1-4

Which reaction graph shows the change in energy of an EXOTHERMIC reaction?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Which reaction graph shows the change in energy of an ENDOTHERMIC reaction?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

Students added a ammonium nitrate to a flask filled with water. They noticed that a reaction occurs and the water temperature decreases quickly. Which of these statements are true about this reaction?

• This reaction is an example of an exothermic reaction.

• Before the reaction, the water has to be warmer than the compound.

• When the compound and water mixes, a decomposition reaction takes place.

• This reaction is an example of an endothermic reaction.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4