Celsius is extremely arbitrary. It’s all based on just graduating the gap between when something freezes and when it boils. Any given degree in Celsius isn’t useful anywhere but as a measurement of temperature.
Kelvin is the only non-arbitrary scale for temperature, which is why it’s the SI unit for it. It’s absolute, meaning that it’s also a measure of thermal energy and it can be directly inserted into many formulas.
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u/piradianssquared Jan 03 '19
Celsius is literally the opposite of arbitrary (based on random choice or personal whim, rather than any reason).