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If several of these conditions are present at the same time, a person's body temperature may rise above safe levels.
VOA: special.2010.07.27
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Now if you're at the temperature which is b higher than the inversion temperature, in that case here, a over RT is small compared to b, and this is going to turn out to be negative.
T>Tinv】,这时a/bR小于,结果是负数，因此如果温度。
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We could just collect a bunch of data. For a material .What's the volume it occupies at some pressure and temperature?
对一种物质我们可以得到一系列测量数据,在给定的温度和气压下,它的体积是什么？
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When it is cooked at a very high temperature, the glass pieces melt and take the shape of the clay form.
VOA: special.2009.09.16
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If you have a large number of atoms in an aggregate, it is going to require that the substance turn solid and condense at room temperature.
如果有很多原子进行聚集，在室温下,会使的物质转变成固体状态。
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The report says that, at maximum activity, the small increase in sunshine over several years causes a small temperature increase in Earth's atmosphere.
VOA: special.2009.09.29
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Because that's the temperature at which many of the molecules in our bodies operate at their most efficient, and enzymes is the best example of that.
因为在正常体温下,体内许多分子活性最高,酶就是其中最好的例子
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Advisers at the University of Illinois Extension say the best planting temperature is fifteen degrees Celsius.
VOA: special.2010.10.12
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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？
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Each team had to create a design that could keep the inside of the house at a temperature of between twenty-two and twenty-four degrees Celsius.
VOA: special.2009.10.27
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RT2 So it's R T2, right, now we're at a lower temperature times log the log of V4 over V3.
等于，这时温度比刚才低,乘以。
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The mineral content of clay also affects the temperature level at which it hardens.
VOA: special.2009.09.09
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And the equation of state, pressure versus volume at constant temperature, is going to have some form, let's just draw it in there like that.
系统的态函数，恒温下压强比体积，变化曲线，就像这样。
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They were prepared at the same temperature as meat with the marinade mixes.
VOA: special.2010.06.01
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And that will end up winning out at basically any realistic temperature where the stuff really is a gas.
在体系仍然处于气体状态的温度下,熵战胜了能量。
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At this temperature, the glass is a bright orange color.
VOA: special.2009.09.16
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So, all I want to do now is look at the derivatives of the free energies with respect to temperature and volume and pressure.
我现在所要做的一切就是,考察自由能对,温度，体积和压强的偏导数。
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OK, now, we're going to look at the internal energy, and we're going to pretend that it is explicitly a function of temperature and volume.
好，我们接下来看看内能，我们假设,它是温度和体积的函数。
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We know how the volume and temperature vary with respect to each other at constant pressure.
知道在恒定压强下,体积如何随着温度变化。
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Avogadro was a professor of chemistry at the University of Turin who did a lot of work on gas laws, understanding the number of gas particles in a given volume at a given temperature.
阿伏加德罗是一个化学教授,在都灵大学,他做了很多关于气体定律的研究，了解气体微粒,在特定的容量和温度下的数目。
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And you can find these compressibility factors in tables. If you want to know the compressibility factors for water, for steam, at a certain pressure and temperature, you go to a table and you find it.
各种气体的压缩系数,想知道水或者水蒸气,在某个温度和压强下的，压缩系数，查表就行了，这是实际气体状态方程的。
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You know how pressure changes with temperature at constant volume if you know the equation of state.
如果你知道状态方程,知道在体积恒定的时压强如何随着温度变化。
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SdT This has minus T dS minus S dT, but the dT part is zero because we're at constant temperature.
这一项包含负的Tds和，但是dT的部分等于零,因为温度为常数。
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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。
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What we define as zero is the enthalpy of every element in its natural state at room temperature and ambient pressure.
我们将零点定义为每种元素,在室温和正常大气压下,在其自然状态下的焓。
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And it's not hard to see how the heat of reaction at room temperature can be related to they heat of reaction at other temperatures.
知道室温下的反应热,如何与其他温度下的反应,热联系起来这点并不困难。
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So at this point the temperature will change.
在这点温度会改变。
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So we're going to start at one, T1 and this is going to be in isotherm at temperature T1, and all the paths here are going to be reversible.
我们从一开始，这是个绝热恒温过程，温度是，所有路径都是可逆的。
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The purpose here is to look at a series of processes in which temperature is held constant, and we're going to calculate how much work we get from allowing a gas to expand under various conditions.
目的是让大家了解一下,几个保持温度不变的过程，然后我们将计算,气体在不同膨胀过程中,的对外做功。
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I won't end up at the same temperature.
但不结束在相同的温度。
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