Multiple Choice
Which state of matter generally has the lowest entropy under the same temperature and pressure conditions?
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19. Chemical Thermodynamics
Entropy
Multiple Choice
Which state of matter typically has the highest entropy under the same conditions of temperature and amount of substance?
A
Gas
B
Solid
C
Plasma
D
Liquid
Verified step by step guidance1
Understand the concept of entropy: Entropy is a measure of the disorder or randomness in a system. The higher the entropy, the greater the disorder.
Recall the general order of entropy for the three common states of matter (solid, liquid, gas) at the same temperature and amount of substance: solids have the lowest entropy, liquids have higher entropy than solids, and gases have the highest entropy.
Consider why gases have the highest entropy: Gas particles move freely and occupy a larger volume with more possible microstates, leading to greater disorder compared to liquids and solids.
Note that plasma is an ionized gas and can have high entropy, but under typical conditions and common comparisons, gases are considered to have the highest entropy among the standard states of matter.
Conclude that under the same temperature and amount of substance, the state of matter with the highest entropy is the gas phase.
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