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Clear the air Is it true that fresh air heats up faster than stale air? And, if so, why? We can see what this means by comparing the molar specific heat capacities of the relevant molecules at constant pressure – that is, the amount of energy required to increase the temperature of a particular volume by 1 unit. Nitrogen and oxygen (which make up over 99 per cent of fresh, dry air) each have a specific heat capacity of a little over 29 joules per kelvin per mole. The equivalents for carbon dioxide and water vapour (at normal temperature and pressure) are higher, around 37 and 35 J/mol.K respectively. …
摘自《新科学家》(New Scientist)第3605期 · 2026年7月25日。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。