Thermal Equilibrium DOL

A student is studying the concept of thermal equilibrium in everyday situations.

What will eventually happen to the temperature of the cold drink if left outside on a

hot day?

• The drink will maintain its cold temperature indefinitely.

• The drink's temperature will decrease further till it lowers the temperature of the surrounding air.

• The drink's temperature will increase until it matches the surrounding air temperature.

• The drink's temperature will fluctuate due to air currents.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

In an experiment, a warm plate (60°C) and a frozen dessert (–10°C) are placed in

contact with each other. Which statements describe the expected thermal behavior?

(Select THREE correct answers.)

• The plate will lose heat and cool down until it reaches a lower temperature.

• The frozen dessert will gain heat, causing it to increase in temperature and

  potentially begin to melt.

• Both items will reach a temperature equal to the initial temperature of the plate.

• Thermal energy will be transferred from the plate to the desert until both

  achieve thermal equilibrium.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

While investigating thermal equilibrium, a student places two known volumes and

temperatures of water into beakers. She places beaker A into beaker B so energy

can be transferred between them, and she records the temperature when it stops

changing. What would you expect the final temperature to be when the student measures it, and why?

• Around 90°C, because the 100°C water will lose thermal energy and the 80°C water

  will gain thermal energy until they reach a temperature between them.

• Around 110°C, because the thermal energy from the 80°C water will be transferred into

  the 100°C water.

• Around 100°C, because the 80°C water gains thermal energy from the 100°C water.

• Around 80°C, because the thermal energy from the 100°C water will be transferred into

  the 80°C water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

When discussing thermal equilibrium, which of the following statements is correct

regarding energy flow?

• Energy flows from cooler to warmer objects until equilibrium is reached.

• Energy flow stops only when all objects are at absolute zero.

• Energy flows from warmer to cooler objects until their temperatures are equal.

• Energy flow does not occur between objects of different states of matter.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A student is conducting two different investigations to test how thermal energy is

transferred when equal amounts of liquid at different temperatures are poured into two different sides of the same container. The two sides are separated from each other by aluminum foil. The conditions for the two investigations are below.

In which investigation will the liquids reach thermal equilibrium first, and why?

• Investigation A; Since the temperatures are closer together, less thermal

  energy will move from the warm water to the cool water. It will take less time

  to transfer less energy.

• Investigation A; Since the temperatures are closer together, less thermal

  energy will move from the cool water to the warm water. It will take less time

  to transfer less energy.

• Investigation B; Since the temperatures are farther apart, more thermal

  energy will move from the warm water to the cool water. It will take less time

  to transfer more energy.

• Investigation B; Since the temperatures are farther apart, less energy will

  move from the cool water to the warm water. It will take less time to transfer

  less energy.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What will happen when the block is placed into the liquid?

• Energy will transfer from the liquid to the block because thermal energy moves from warmer temperatures to cooler temperatures.

• Energy will transfer from the liquid to the block because thermal energy moves from more massive substances to less massive substances.

• Energy will transfer from the block to the liquid because thermal energy moves from cooler temperatures to warmer temperatures.

• Energy will transfer from the block to the liquid because thermal energy moves from more massive substances to less massive substances.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4