gram-molecular volume


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gram-molecular volume,

the volume occupied by one gram-molecular weightgram-molecular weight,
amount of a molecular substance whose weight, in grams, is numerically equal to the molecular weight of that substance. For example, one gram-molecular weight of molecular oxygen, O2
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 of any substance at STPSTP
or standard temperature and pressure,
standard conditions for measurement of the properties of matter. The standard temperature is the freezing point of pure water, 0°C; or 273.15°K;.
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. See molar volumemolar volume,
the volume occupied by a mole of a substance at STP. According to Avogadro's law, at a given temperature and pressure a given volume of any gas contains the same number of molecules. At STP 1 mole of gas occupies 22.414 liters.
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gram-molecular volume

[¦gram mə¦lek·yə·lər ′väl·yəm]
(chemistry)
The volume occupied by a gram-molecular weight of a chemical in the gaseous state at 0°C and 760 millimeters of pressure (101,325 pascals).