Thermochemistry Test Review

A sample of water with a specific heat of 4.186 joules/gram is cooled from 65° C to 15° C by the removal of 275 joules of heat.

What is the mass of the water?

• 0.043 g

• 1.31 g

• 57,557.50 g

• 3.04 x 10^-4 g

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

This is a potential energy diagram.

What can be concluded from the potential energy diagram?

• The reaction was endothermic.

• The reaction was exothermic.

• The reaction was at equilibrium.

Tags

NGSS.HS-PS1-4

A garbage disposal chops waste food into tiny pieces that move easily through sewage pipes.

The garbage disposal converts electrical energy to _________.

• heat energy

• radiant energy

• chemical energy

• mechanical energy

Which object, by itself, produces a large amount of both heat and light energy?

• 
• 
• 
• 

The temperature of 15 grams of water increased by 3.0° Celsius (specific heat of water is 4.186 J/g•°C).

How much heat was absorbed by the water?

• 20.90 J

• 50.23 J

• 75.34 J

• 188.37 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

A solid object at 30°C is placed inside a container of liquid at 60°C. What most likely will be observed?

• temperature of the liquid will remain the same

• temperature of the solid object will decrease

• temperature of the liquid will increase

• temperature of the solid object will increase

Tags

NGSS.HS-PS3-4

As the average kinetic energy of a substance increases, the temperature of the sample

• decreases

• increases

• remains the same

Tags

NGSS.HS-PS3-2

An ice cube, a cup of hot soup, and a quarter are put into a closed container. What happens?

• Everything in the container will reach the temperature of the quarter

• Everything in the container will reach thermal equilibrium

• Everything in the container will reach the freezing point of water

• Everything in the container will remain at its original temperature

Tags

NGSS.HS-PS3-4

Substances can be made to change phase by adding or taking away _____________.

• specific heat

• energy

• particles

• mass

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The diagrams shown represent two solids and the temperature of each.

What occurs when the two solids are placed in contact with each other?

• Heat energy flows from solid A to solid B. Solid A decreases in temperature.

• Heat energy flows from solid A to solid B. Solid A increases in temperature.

• Heat energy flows from solid B to solid A. Solid B decreases in temperature.

• Heat energy flows from solid B to solid A. Solid B increases in temperature.

Tags

NGSS.HS-PS3-4