In which of the system Iisted below is the entropy decreasing:
Correct answer: A. A gas is cooled
- A. A gas is cooled
- B. A plate is shattered
- C. An egg is scrambled
- D. A drop of dye diffuses in a cup of water
Explanation
Cooling a gas removes energy and reduces the number of microstates available to it, so its entropy falls. Shattering a plate, scrambling an egg and letting a dye diffuse all increase disorder and therefore increase entropy.
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About Thermodynamics
Thermal equilibrium and heat explain how temperature and energy transfer are related, while molar specific heats describe the heat required by a gas at constant volume or constant pressure. The first law connects heat supplied, work done and change in internal energy, with sign conventions kept distinct from temperature changes.
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