Thermodynamics: The 2016 advent calendar
Day 12

The second law of thermodynamics

What is entropy? Why is it always increasing? And what does that even mean? Dr Valeska Ting explains the second law of thermodynamics.

Chemical engineer Valeska Ting walks us from a simple mathematical demonstration, through coffee and refrigerators, and right up to the end of the Universe and everything in it. The second law of thermodynamics states that entropy, which is often thought of as simple ‘disorder’, will always increase within a closed system.

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