week 16: Day 3 : Thermal Equilibrium

What is thermal equilibrium?

• A state where two objects in contact exchange energy until they reach the same temperature.

• A state where two objects in contact have different temperatures but do not exchange energy.

• A state where energy is continuously transferred between two objects without reaching a balance.

• A state where two objects in contact have the same mass.

Which of the following best describes specific heat capacity?

• The total energy required to change the temperature of a substance.

• The amount of heat required to raise the temperature of 1 kg of a substance by 1°C.

• The energy needed to change the state of a substance from solid to liquid.

• The heat lost by a substance when it cools down.

Which of the following is an application of thermal equilibrium?

• Using a thermometer to measure body temperature.

• Boiling water to make steam.

• Melting ice to form water.

• Freezing water to make ice cubes.

What is the formula for calculating thermal energy?

If two objects are in thermal equilibrium, which of the following statements is true?

• They have the same mass.

• They have the same temperature.

• They have the same volume.

• They have the same specific heat capacity.

Which of the following factors does not affect the specific heat capacity of a substance?

• The mass of the substance.

• The type of material.

• The temperature change.

• The phase of the substance (solid, liquid, gas).

In the context of thermal equilibrium, what happens when a hot object is placed in contact with a cold object?

• The hot object becomes hotter.

• The cold object becomes colder.

• Heat flows from the hot object to the cold object until they reach the same temperature.

• No heat is exchanged between the objects.

Which of the following is an example of a system reaching thermal equilibrium?

• A cup of hot coffee cooling down to room temperature.

• A refrigerator cooling down food items.

• A heater warming up a room.

• A car engine heating up while driving.