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2 cards from this section. Quick, good the night before a test.
Define entropy.
Think about how disorder relates to energy systems.
What does the second law of thermodynamics state?
Consider what happens during spontaneous processes.
What is entropy?
Consider the state of a messy room versus a tidy room.
True or False: Spontaneous processes lead to a decrease in entropy.
Think about systems that tend toward disorder.
A heat engine operates between 500 K and 300 K. Calculate the maximum efficiency of this engine based on the second law of thermodynamics.
Use the formula for efficiency of heat engines.
Analyze the spontaneity of the reaction A → B, given ΔH = 50 kJ and ΔS = 200 J/K.
Remember to keep units consistent!
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