Thermal Equilibrium

What is thermal equilibrium?

• The transfer of cold between two objects of different temperatures

• The transfer of heat between two objects of similar temperatures

• The transfer of heat between two objects of different temperatures

• The transfer of cold between two objects of similar temperatures

Which of the following is an example of thermal equilibrium?

• Placing a hot cup of coffee in a refrigerator

• Holding a cold ice cream cone in your hand

• Touching a hot stove and quickly pulling your hand away

• Leaving a pizza out of the oven for too long and it becomes cold

What happens to the temperature of two objects in thermal equilibrium?

• The temperature of both objects increases

• The temperature of both objects decreases

• The temperature of one object increases while the other decreases

• The temperature of both objects remains the same

Which of the following statements about thermal equilibrium is true?

• Heat always flows from a hot object to a cold object

• Heat can flow from a hot object to a cold object or vice versa

• Heat always flows from a cold object to a hot object

• Heat does not flow between objects in thermal equilibrium

Heat transfer process where warmer areas of a liquid or gas rise to cooler areas in the same liquid or gas.​ (a)   ​

If two systems are both in thermal equilibrium with a third system, they are in thermal equilibrium with each other.​ (b)  

Heat transfer that occurs through empty space with no need for a medium. ​ (c)   ​

Process of heat transfer through direct contact of particles. ​ (d)  

• Convection
• Zeroth Law of Thermodynamics
• Radiation
• Conduction

In a thermal equilibrium situation, which two of the following principles apply?

• The Zeroth Law of Thermodynamics

• Newton's First Law of Motion

• The Law of Conservation of Energy

• The Law of Universal Gravitation

• The Second Law of Thermodynamics

When baking a cake, heat is transferred from the _____________ in the oven to the dough until there is ___________________between the dough and the surroundings.

• cold air, thermal contact

• hot air, thermal contact

• cold air, thermal equilibrium

• hot air, thermal equilbrium

After taking a hot shower, James steps out of the shower onto the tile floor. The tile felt cold to his feet. Which explanation below best describes James' experience?

• Heat from his feet is transferred to the tile floor
• Heat from the tile floor is transferred to his feet
• Cold from the tile floor is transferred to his feet
• Cold from his feet is transferred to the tile floor

The hot water is added to the cold water.
Which of the following statements is correct if there are no heat losses to the surrounding?

• The heat gained by the cold water is greater than the heat lost by the hot water
• The heat gained by the cold water is equal to the heat lost by the hot water
• The heat lost by the hot water is less than the heat gained by the cold water
• The heat gained by the cold water is less than the heat lost by the hot water

Which of the following statements correctly apply to the concept of heat transfer in thermal equilibrium?

• Heat always flows from a higher temperature object to a lower temperature one

• Heat transfer requires physical contact between objects

• Heat can flow from a lower temperature object to a higher one

• Heat transfer stops when objects reach thermal equilibrium

• Heat transfer can occur without any medium