日常生活中的科学
Why do some reactions get hot?
Combustion releases energy to the surroundings; at constant pressure this is described by a negative enthalpy change.
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简短答案
Combustion releases energy to the surroundings; at constant pressure this is described by a negative enthalpy change.
真正发生了什么？
At constant temperature and pressure, ΔG combines enthalpy and entropy to indicate thermodynamic spontaneity.
一个有用的直观图景
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Chemical reactions rearrange bonds and redistribute energy. If the reacting system transfers energy to its surroundings as heat at constant pressure, its enthalpy change is negative.