Density issue of gaseous methane
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This post was last edited by Desert Fish on 2021-7-31 at 16:55. According to the Organic Volume of the Handbook of Physical Properties of Chemicals and Materials, the density of gaseous methane at 0°C is 46 kg/m3. How should this be understood? Under standard conditions, the density of methane is 717 kg/m3. Is this the density of methane at 15 atmospheres?
I don’t understand how 717 was calculated
I can see it; the calculation result is correct, but the unit is wrong. At standard conditions, the density of methane is 717 g/m3. Standard conditions refer to 1 standard atmosphere and 0°. To determine the density of methane at 15 atmospheres, a pressure conversion is necessary ； The density of a gas is proportional to its pressure.
I don’t understand under what conditions the density specified in the manual applies
I want to figure out under what conditions the density specified in the manual applies
For the image you posted, where did the data come from? It seems to be incorrect; otherwise, there should be other conditions mentioned earlier. It is recommended to download the correct \"Handbook of Physical Properties of Chemicals and Chemical Engineering Materials\".
Thank you, I’ll look for some printed books
This diagram has no conditional specifications. It appears to be the gas phase density under a stable state of coexistence between gas and liquid. Liquefied methane gas at 0 degrees, with a pressure of 6.4 Mpa and a gas density of 46 kg/m3
There are no conditions specified in the manual; what you say makes sense. I’ll do some calculations and checks to take a look