Thermal Energy Quiz

Which of the following substances is made up of particles with the highest average kinetic energy?

• Fe(s) at 35°C

• Br2(l) at 20°C

• H2O(l) at 30°C

• CO2(g) at 25°C

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

• decreases

• increases

• remains the same

Tags

NGSS.HS-PS3-2

Solid X is placed in contact with solid Y. Heat will flow spontaneously from X to Y when

• X is 20°C and Y is 20°C

• X is 10°C and Y is 5°C

• X is -25°C and Y is -10°C

• X is 25°C and Y is 30°C

Tags

NGSS.HS-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

Solid A at 80°C is immersed in liquid B at 60°C. Which statement correctly describes the energy changes between A and B?

• A releases heat and B absorbs heat.

• B absorbs heat and A releases heat.

• Both A and B absorb heat.

• Both A and B release heat.

Tags

NGSS.HS-PS3-4

Which transfer of energy occurs when ice cubes are placed in water that has a temperature of 45°C?

• Chemical energy is transferred from the ice to the water.

• Chemical energy is transferred from the water to the ice.

• Thermal energy is transferred from the ice to the water.

• Thermal energy is transferred from the water to the ice.

Tags

NGSS.HS-PS3-4

Object A at 40.0°C and object B at 80.0°C are placed in contact with each other. Which statement describes the heat flow between the objects?

• Heat flows from object A to object B

• Heat flows from object B to object A

• Heat flows in both directions between objects.

• No heat flow occurs between

Tags

NGSS.HS-PS3-4

A cube of iron at 20.0°C is placed in contact with a cube of copper at 60.0°C. Which statement describes the initial flow of heat between the cubes?

• Heat flows from the copper cube to the iron cube.

• Heat flows from the iron cube to the copper cube.

• Heat flows in both directions between the cubes.

• Heat does not flow between the cubes.

Tags

NGSS.HS-PS3-4

According to the potential energy diagram shown, the chemical reaction in the forward direction is

• exothermic because it absorbs energy

• exothermic because it releases energy

• endothermic because it absorbs energy

• endothermic because it releases energy

Tags

NGSS.HS-PS1-4

When NH4NO3 is dissolved in water, the temperature of the water decreases. When NaOH is dissolved in a separate water sample, the temperature of the water increases. Based on these observations, it can be concluded that the dissolving of

• both salts is endothermic

• both salts is exothermic

• NH4NO3 is endothermic and the dissolving of NaOH is exothermic

• NH4NO3 is endothermic and the dissolving of NaOH is endothermic

Tags

NGSS.HS-PS3-4

NGSS.HS-PS1-5