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This so-called 'bio-gas' is burned like natural gas in a small electric power plant right on Vander Haak's farm.
VOA: standard.2010.02.23
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I'm going to write it like this three moles of hydrogen which is a gas one bar 100 degrees Celsius.
我会写成这样：,三摩尔氢分子，气体,1巴，100摄氏度。
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dT/dp is mu JT. So for a real gas like air, this is a positive number. It's not zero.
所以对于像空气这样的真实气体，这是一个正数，不等于零。
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"It could be hitting natural fractures that already exist." Fox notes that toxic gases like benzene,toluene and hexane also accompany natural gas extraction.
VOA: standard.2010.01.02
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B=0 There's going to be some temperature where B is equal to zero. In that case, your gas is going to look awfully like an ideal gas.
在某个温度,这时，实际气体的表现，十分接近理想气体,高于这一温度它是正的。
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Those infrared emissions will allow the telescope to peer through cosmic dust and gas to see things like the evolution of early stars and galaxies.
VOA: standard.2009.05.14
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While these gas molecules or atoms through first approximation, are like hard spheres.
可以看做刚性小球,每一个分子会占据。
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Right now, And that has created problems - like in January, when a gas pricing dispute with Ukraine cut energy supplies and left a number of Europeans without heat.
VOA: standard.2009.05.08
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So from measured equation of state data, or from a model like the ideal gas or the van der Waal's gas or another equation of state you know this.
所以，从测量的到的状态方程的数据，或者从状态方程模型比如理想气体方程,范德瓦尔斯方程或者其他状态方程,我们就可以知道。
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it's kind of like the Joule expansion, an ideal gas.
焦耳-汤姆逊膨胀过程相似。
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OK, you use the ideal gas law, etc., then you get a relationship that connects the pressure and the temperature, like here we got a relationship that connected the temperatures and the volumes together.
我们会得到，一个联系初末态,的压强和温度的，关系式,就像这个联系过程中。
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Just like our substance doesn't care where the gas is. It's kind of universal.
与压强无关的参考点,那就再好不过了。
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It's like the ideal gas law, and one could know that in principle.
有点像理想气体定律，我们可以从原理上理解这点。
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but right now you're going to have to take it for granted. So, if the Joule-Thomson coefficient is equal to zero, just like we wrote, du = Cv dT du = Cv dT for an ideal gas, we're going to dH = Cp dT have dH = Cp dT for an ideal gas as well.
但是现在请你们应该把它看成理所当然的,所以，如果焦耳-汤姆逊系数等于零,就像我们写的，对于理想气体,我们也可以得到对于理想气体。
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