And if you work out the energetics as we've gone with thermochemistry, dH you discover there's a huge negative delta H.
如果你计算能量变化,就像在化学热力学中所作的一样,你会发现很大的负的。
And it's really like maybe here and New York is the only place that you'll be able to really feel it.
真的,恐怕只有在这里和纽约你才能感受到这种能量。
It turns out everything around us moves energy around in one way or the other If you're a biological system, you're burning calories, burning ATP.
我们周围的一切物质,都以这样那样的方式传递着能量,如果你是一个生物系统,你会燃烧卡路里,燃烧。
So really what we'll probably do is instead either give you the wavelength or the frequency and you'll go ahead and calculate the energy from there.
所以实际上我们可能的做法是,给你波长或者频率,然后你可以通过他们计算得到能量。
If you looked at heteronuclear molecules and you wanted to compute the bond energy, you might start with the bond energies of the two constituents.
如果你看那些相同电子的分子,你想计算共享能,你也许会从,两个组成部分的总能量。
Well the cauliflower has some nutrients that are important, but the Haagen-Dazs has immediate value because of the energy it gives you.
菜花里面含有一些重要的营养物质,但哈根达斯的价值则更直接,它可以马上为你提供能量
A related view is that sleep emerged to preserve energy and keep you out of trouble at night.
相似地,睡眠是为了保存能量,还能让你晚上不去惹麻烦。
so he came back with the whole new aspect to the game, whole, you know, renewed energy.
所以他回来带给比赛崭新的一面,你知道,整个全新的能量。
Now, your temptation is to keep the first answer because you know energy is not going to be negative.
你肯定想保留正根,因为你知道能量不会是负值
you know, it's an energy in Hollywood that you don't find most places, you know.
你知道吗? 好莱坞有一种大部分地方没有的能量。
You need energy to move your arms around and move around mechanical systems, obviously, cars, boats, etcetera.
你需要能量,来移动胳膊和走动,机械系统,汽车,船等等。
At some point you're going to hit a well here, which is the point where it's most stabilized or at its lowest energy.
直到某一时刻,你会到达这个势阱,也就是体系最稳定,或者说能量最低的位置。
So, if you could make automobiles with a high magnesium content, you would reduce the mass, reduce the energy required, and thereby reduce the environmental impact.
所以,如果你能用含镁量,很高的材料来制造手机,你就能减轻手机的质量,减少制造所需能量,因此减轻了对环境的破坏。
How much energy are you going to get out, and how far are you going to be able to drive a car with this expansion, let's say, so that's the problem.
你能获得多少能量,利用这次膨胀,你可以把你的车开出多远,比如说这就是问题所在。
And even in astrophysics, when you talk about stars, black holes, etcetera you're moving energy around.
即使在天文学中,当你谈论恒星,黑洞等时,你能量的转移。
You can see low voltage, low energy, high voltage, high energy. It is a linear function.
你会看到,低电压,低能量,高电压,高能量,这是种线性关系。
You see the same thing regardless of which orbital you're looking at.
能量是低于氢原子的,无论你观察哪个轨道都可以看到相同的事情。
Sublimation is you might have a lot of energy, maybe sexual energy or aggressive energy, but instead of turning it to a sexual or aggressive target what you do is you focus it in some other way.
升华是你有很多的能量,可能是性能量,也可能是攻击能量,但你并未将它们指向性目标或攻击目标,而是将这些能量以其他方式进行了释放。
I mean, think of going out to a nice dinner, you're completely full, your body doesn't really need more calories necessarily, your stomach has had enough, and then the dessert cart comes by, or there are the mints on the way out of the restaurant or something.
我是说,比如出去享用一顿丰盛的大餐,你已经完全吃饱了,你的身体确实不再需要更多的能量,胃也填满了,这时甜品车经过身边,或者在出餐厅时门口时有人给你薄荷糖
If you have a brain, and a body, and a metabolism that wants calories, it wants fat, it wants sugar, it wants a broad variety of food so you can survive, that would be good if you lived in certain parts of the world today.
如果你有大脑,有身体,有新陈代谢,这些都需要能量,就需要脂肪,需要糖,需要极其多样食物,你才能活下来,世界上只有部分地区可以保证这些
And I'm going to call this the you can break even law; you can break even law.
我叫它,你能保本定律“,你不会失去能量。
And you would find that the bond energy of the heteronuclear molecule was nowhere on the average of the two.
你将发现,电子相同的分子的总能量,并不是平分的。
And what you find is when you have a bonding orbital, the energy decreases compared to the atomic orbitals.
你们发现当你有个成键轨道的时候,相比原子轨道能量要降低。
If you take in more calories than you consume, it gets stored in the fat cells, that's the energy bank that you can draw upon if you don't have enough food and starvation or famine were an issue.
如果你摄入的热量超过消耗的,热量就会存储在脂肪细胞中,这就是能量库,你可以在,食物不够以及饥饿或饥荒的时候利用它
Already from this class if I told you that I gave you energies in some spectrum but they were off by a factor of four, what would you think? Maybe the Z is wrong.
从这节课开始,如果我告诉你我给了你,在某些光谱里的能量,但它们不属于四大元素之一,你会怎么想?也许Z是错的。
And if you want to run a furnace and provide energy that's an extremely important thing to be able to calculate.
如果你点燃壁炉,提供能量,计算这个量,是非常重要的。
In terms of picking a Lewis structure that's going to be the lowest energy, what you want to do is put the atom with the lowest ionization energy in the center of your atom.
为了挑选一个具有,最低能量的路易斯结构,你需要把电离能最低的原子,放在最当中的位置。
So, having other particles around that have the same energy that you could technically add up if you were adding them up like a wave, you can't do the same thing with particles, they're all separate.
所以,如果它们是波,你可以把其他的,拥有相同能量的粒子加起来,但是你不能把这些粒子加起来,因为它们是分离的。
And the reason for this, and this is a very important point about the photoelectric effect, and the point here is that the electrons here are acting as particles, you can't just add those energies together.
这个现象的原因是,这是光电效应非常重要的一个论点,这个论点就是电子,在这里是粒子行为,你不能仅仅把这些能量加在一起。
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