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Question - Mass, Density and Volume

Question - Mass, Density and Volume

Lance Michael Farrar

@lance-michael-farrar-5J1nuI • Oct 27, 2024

Oct 27, 2024

29.6K

I need some info. A single atom of Carbon has a Mass, Density and Volume at room temperature. How do these change when that Atom is moved to a temperature of -253c. Example; If the Mass, Density and Volume were each arbitrarily given the value of 1 at room temperature - what {if any} would be the % of change when that Atom is moved to -253c?

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Ramani Aswath

@ramani-VR4O43 • Sep 2, 2015

A single atom does not have a density as defined for bulk matter.

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Lance Michael Farrar

@lance-michael-farrar-5J1nuI • Sep 2, 2015

What about Volume?

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Lance Michael Farrar

@lance-michael-farrar-5J1nuI • Sep 2, 2015

Does it have Volume and if so does that change?

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Ramani Aswath

@ramani-VR4O43 • Sep 2, 2015

This may help:
#-Link-Snipped-#

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Lance Michael Farrar

@lance-michael-farrar-5J1nuI • Sep 3, 2015

Thank you.

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Lance Michael Farrar

@lance-michael-farrar-5J1nuI • Sep 3, 2015

A.V.RamaniThis may help:
#-Link-Snipped-#
Thank you. I didn't see a reference to temperature in the equations. Does that mean that an atom of Carbon has the exact same volume at -253c as it does at room temperature? The reason for asking is that if the volume is lower at -253c then more of them can be held in a smaller space. If they can be contained within that space and brought up to room temperature then the product would have a higher density. Thanks again, Lance

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Ramani Aswath

@ramani-VR4O43 • Sep 4, 2015

The volumetric coefficient of thermal expansion for diamond is about 0.000003 which means that at -253degC it will contract to (1 - 0.000760) times the volume at 0 degC.

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Lance Michael Farrar

@lance-michael-farrar-5J1nuI • Sep 4, 2015

It sounds like the volume of a single Carbon atom at room temperature is the same whether it is in the form of a lump of coal or in a Diamond. and it is also the same at -253c.

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Lance Michael Farrar

@lance-michael-farrar-5J1nuI • Sep 4, 2015

The volume of a single carbon atom is the same whether it is in a Diamond or piece of coal?

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Ramani Aswath

@ramani-VR4O43 • Sep 4, 2015

Coal is a mix of various things, not just carbon.

This gives specific info on the various carbon allotropes:
#-Link-Snipped-#

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Lance Michael Farrar

@lance-michael-farrar-5J1nuI • Sep 4, 2015

Thank you for your input.

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