But we've defined the enthalpy of those elements in their stable state at room temperature and pressure as zero, right?
但我们已经定义了这些,元素处于它们室温和常压下,最稳定的状态时的焓为零,对吧?
Hydrogen gas it's in its most stable state, right at room temperature and pressure.
和常压下氢气是氢元素,最稳定的状态,这个小“0“
What is happening is it turns out that putting the electrons in that lower energy state is stabilizing that molecule So that works.
发生的就是,把电子放在低能级状态,稳定了分子,因此这就行得通了。
So, if we want to go from that stable state to that less stable state, we need to put in a certain amount of energy to our system, that difference between the free electron and the electron bound to the metal.
所以,如果我们想使电子,从稳态到达不够稳定的状态,我们需要引入一定数量的,能量到系统中,即自由电子和束缚于金属的,电子的能量差。
This is really a general idea in psychology that we are in a way wired up to be more sensitive to change than to steady states.
这是心理学上一个普遍的观点,某种意义上,比起稳定状态,我们对变化更敏感。
Well that process of control to maintain a constant environment inside our body, whether it's an environment of constant mass or constant composition, or constant temperature, is called homeostasis.
这个控制过程维持着,体内环境的恒定,不论是内环境中物质的量的稳定,或者成分的稳定,或温度的稳定,这种状态叫做内稳态
Every creature, he says, has a built-in desire to preserve itself, to persevere in its own existence, to continue in its own steady state you might say, and to resist invasion or encroachment by others.
他说,任何一个生物都生而具有,保护自己的本能,保护自己的存在,延续自己稳定的状态,抵抗外界的侵犯。
Delta H of formation means the enthalpy of this compound minus the enthalpy of its constituent elements in their most stable state at room temperature and pressure.
生成焓就是这种组分,的焓减去它的所有组成元素,在室温和常压下处于,其最稳定的状态时的焓。
Iron as an element is a solid. That's it's most stable state at room temperature and pressure, right, and so on. And then we can figure out heats of formation.
铁单质是固态,这是他在室温和常压下,最稳定的状态,然后我们,可以算出生成热,现在这个。
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