Entropy
Physics ⇒ Heat and Thermodynamics
Entropy starts at 11 and continues till grade 12.
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Describe how entropy is related to the number of microstates in a system.
Describe the relationship between entropy and the direction of spontaneous processes.
Describe what happens to the entropy of the surroundings when a system absorbs heat reversibly.
Explain the significance of Boltzmann's entropy formula S = k ln W.
Explain the significance of entropy in the context of the arrow of time.
Explain why entropy increases in an irreversible process.
Explain why entropy is considered an extensive property.
A metal block at 500 K is placed in contact with a large reservoir at 300 K. 1000 J of heat flows from the block to the reservoir. Calculate the total change in entropy of the universe.
Which law of thermodynamics introduces the concept of entropy?
(1) Zeroth Law
(2) First Law
(3) Second Law
(4) Third Law
Which of the following best defines entropy in thermodynamics?
(1) The total energy of a system
(2) The measure of disorder or randomness in a system
(3) The amount of heat required to raise the temperature by 1 K
(4) The work done by a system
Which of the following best describes the third law of thermodynamics?
(1) The entropy of a perfect crystal at absolute zero is zero
(2) The entropy of the universe is constant
(3) The entropy of a system is always increasing
(4) The entropy of a gas is always greater than that of a solid
Which of the following is a correct statement about entropy and equilibrium?
(1) Entropy is maximum at equilibrium
(2) Entropy is minimum at equilibrium
(3) Entropy does not change at equilibrium
(4) Entropy is undefined at equilibrium
Fill in the blank: Entropy is a _______ function, meaning its change depends only on the initial and final states.
Fill in the blank: The entropy change for a reversible isothermal expansion of an ideal gas is ΔS = nR _______.
Fill in the blank: The second law of thermodynamics states that the total entropy of an isolated system can never _______ over time.
The change in entropy (ΔS) for a reversible process is given by the formula ΔS = _______.
Is entropy a state function? (Yes/No)
True or False: Entropy can decrease in a system as long as the entropy of the surroundings increases by a greater amount.
True or False: Entropy is a measure of the energy in a system that is available to do work.
True or False: Entropy is always conserved in all thermodynamic processes.
