Entropy
Physics ⇒ Heat and Thermodynamics
Entropy starts at 11 and continues till grade 12.
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Describe the significance of entropy in the context of heat engines.
Describe what happens to the entropy of the surroundings when a system undergoes an exothermic reaction.
Explain the relationship between entropy and the direction of time (the arrow of time).
Explain why entropy increases when a solid changes to a liquid.
Explain why entropy is considered a state function.
A 1.5 mol sample of an ideal gas is compressed adiabatically and reversibly from 10.0 L to 4.0 L. What is the change in entropy of the gas?
A chemical reaction occurs in an isolated system and results in a decrease in the system's entropy. What must be true about the entropy change of the surroundings for the process to be spontaneous?
A metal block at 500 K is placed in contact with a large reservoir at 300 K. If the block loses 1200 J of heat, calculate the total change in entropy of the universe.
Which law states that the entropy of a perfect crystal at absolute zero is zero?
(1) First Law of Thermodynamics
(2) Second Law of Thermodynamics
(3) Third Law of Thermodynamics
(4) Zeroth Law of Thermodynamics
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 entropy change of the universe for a reversible process?
(1) Positive
(2) Negative
(3) Zero
(4) Cannot be determined
Which of the following is NOT a spontaneous process?
(1) Ice melting at room temperature
(2) Water freezing at -5℃
(3) Gas compressing spontaneously in a closed container
(4) Sugar dissolving in water
Fill in the blank: For a spontaneous process in an isolated system, the entropy always ________.
Fill in the blank: The entropy change for a reversible adiabatic process is ________.
Fill in the blank: The SI unit of entropy is ________.
If a gas expands isothermally and reversibly from volume V1 to V2, the change in entropy is given by ________.
Is it possible for the entropy of a system to decrease?
True or False: Entropy can be negative for a system.
True or False: Entropy can be transferred between a system and its surroundings.
True or False: Entropy is an extensive property.
