It's a state function, so we're at constant temperature and pressure, and now we want to consider some chemical change or a phase transition or you name it.
这就是态函数，我们处于恒定的温度和压强之下，然后考虑某些化学变化或者相变，或者你想考虑的东西。
This change of state is a physical and not a chemical one.
这种状态的变化是物理变化而不是化学变化。
This change of state is a physical change and not a chemical one.
这种状态变化是物理变化，而不是化学变化。
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