16 Questions
What is entropy a measure of?
Disorder
Which of the following has low entropy?
Ice
According to the Laws of Thermodynamics, what can never decrease in a total system?
Total system entropy
In terms of entropy, what does steam have compared to ice?
More entropy
What does the change in entropy of the cold body signify?
Change in disorder
What must happen to the entropy in one part of a system if it decreases locally?
It must increase elsewhere by at least as much
What happens to entropy as the temperature approaches zero?
Entropy decreases
Which equation relates heat energy change and entropy change?
$\Delta Q = T \Delta S$
How does adding heat affect entropy?
Increases entropy
What is the concept of the 'total system' in relation to entropy change?
Entropy must increase elsewhere by at least as much
What does the second law of thermodynamics impose a constraint on?
Total entropy
In the context of heat transfer, what does ΔStot represent?
Total entropy change
What must happen to the entropy of the sink when heat is added?
It must increase
What does the inequality ΔQc ≥ (Tc/Th)ΔQh set a minimum on?
The heat delivered to the sink ΔQc
What is the consequence of violating the second law of thermodynamics?
Entropy increase in the source
Why can't the efficiency be 100% by sending no heat to the sink, according to the text?
Because it violates the second law of thermodynamics
Test your knowledge on thermodynamics and energy flow with this quiz. Questions cover concepts such as temperature difference, heat transfer, mechanical work, and entropy changes in hot and cold bodies.
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