Thermal Equilibrium
Physics ⇒ Heat and Thermodynamics
Thermal Equilibrium starts at 8 and continues till grade 12.
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See sample questions for grade 11
A metal block at 80 °C is placed in water at 20 °C. After some time, both reach 30 °C. What is the final state called?
A thermometer is placed in a liquid. After a few minutes, the thermometer reading stops changing. What does this indicate?
Describe a real-life example of thermal equilibrium.
Describe what happens when a hot object is placed in a cooler environment.
A 100 g iron block at 80 °C is placed in 200 g of water at 25 °C. If the specific heat of iron is 0.45 kJ/kg·K and water is 4.18 kJ/kg·K, what is the final temperature at equilibrium?
A 2 kg block of copper at 100 °C is placed in 1 kg of water at 20 °C. If no heat is lost to the surroundings, what is the final temperature at equilibrium? (Specific heat of copper = 0.39 kJ/kg·K, water = 4.18 kJ/kg·K)
A 500 g aluminum block at 60 °C is placed in 200 g of water at 20 °C. If no heat is lost, what is the final temperature? (Specific heat of aluminum = 0.9 kJ/kg·K, water = 4.18 kJ/kg·K)
A metal block at 80 °C is placed in water at 20 °C. After some time, both reach 30 °C. What is the final state called?
Which of the following best describes thermal equilibrium?
(1) Objects have the same mass
(2) Objects have the same temperature
(3) Objects have the same volume
(4) Objects have the same density
Which of the following is a correct statement about thermal equilibrium?
(1) It can only occur in gases
(2) It requires no heat transfer between systems
(3) It requires systems to be at different temperatures
(4) It is unrelated to the Zeroth Law of Thermodynamics
Which of the following is a direct consequence of the Zeroth Law of Thermodynamics?
(1) Conservation of energy
(2) Definition of temperature
(3) Conservation of mass
(4) Increase of entropy
Which of the following is NOT a condition for thermal equilibrium?
(1) No net heat flow between objects
(2) Objects are at the same temperature
(3) Objects are in physical contact
(4) Objects are at different temperatures
Fill in the blank: The process of reaching thermal equilibrium involves the transfer of __________ from the hotter object to the cooler one.
Fill in the blank: The Zeroth Law of Thermodynamics is fundamental for the concept of __________.
Fill in the blank: The Zeroth Law of Thermodynamics provides the basis for the concept of __________.
Fill in the blank: When two objects are at the same temperature, they are said to be in __________.
If two bodies are in thermal equilibrium, is there any net heat transfer between them? (Yes/No)
True or False: At thermal equilibrium, the average kinetic energy of the particles in both objects is the same.
True or False: The concept of thermal equilibrium is only applicable to solids.
True or False: The Zeroth Law of Thermodynamics allows us to define temperature as a measurable property.
