Why Does Ice Float in Water at 9°C?

[pscience]

Please help. Ice is more denser than water when temperature of water ≥9°C. Then why ice doesn't sink in water at these temperatures? I greatly appreciate your help.
Density chart: http://www2.volstate.edu/chem/1110/Density_of_Water.htm

 

[Gullik]

The density of ice is 0.9167 g/cm3 at 0 °C,[3]

I don't see the water density becoming smaller than that in the chart you linked to, at 9 degrees the water was at the 0.9997xx area.

 

[russ_watters]

Please help. Ice is more denser than water when temperature of water ≥9°C. Then why ice doesn't sink in water at these temperatures? I greatly appreciate your help.
Density chart: http://www2.volstate.edu/chem/1110/Density_of_Water.htm

Ice and water can't exist together at >9C (in equilibrium). Ice melts and water freezes at 0C and as soon as you drop ice into water, the water's temperature starts to drop until there is quickly an equilibrium (at least locally).

[edit]...er, yeah, and it looks like the density claim is wrong anyway. Ice's density is 0.917...

 

[pscience]

ice float

I don't see the water density becoming smaller than that in the chart you linked to, at 9 degrees the water was at the 0.9997xx area.

As per any density-Temp chart or graph I found online giving unique info and that is ice is denser than water at temperatures more than 9C. Please be specific about temperatures.

 

[berkeman]

As per any density-Temp chart or graph I found online giving unique info and that is ice is denser than water at temperatures more than 9C. Please be specific about temperatures.

Where is ice listed in the chart in your link? All I see is water density numbers.

And as has been said already, ice does not exist at 9C...

 

[pscience]

Thank you for your time my friend. Do you think that water of any temperature is denser than ice?
For example which is more denser? ice(0C) or water(20C)

 

[berkeman]

Thank you for your time my friend. Do you think that water of any temperature is denser than ice?

If ice has the density quoted or 0.917g/cm^3, and you look at your table, what do you think?

What is the context of your question?

 

[pscience]

No context my friend. I was reading a physics book and curious to know more about it. so, you think that ice is less denser than water of any temperature. Is that correct? thank you.

 

[Doc Al]

As per any density-Temp chart or graph I found online giving unique info and that is ice is denser than water at temperatures more than 9C.

Why don't you give the link to that reference so we know what you were looking at.

 

[Student100]

No context my friend. I was reading a physics book and curious to know more about it. so, you think that ice is less denser than water of any temperature. Is that correct? thank you.

Maybe I'm getting a little out of the context of the question, but it's thought super-cooled water at the lower bounds is less dense than ice. There's still a lot of research and experimentation going on about the thermodynamics of super-cooled water.

 

[pscience]

Yes, the same chart I posted above my friend. Water density at 9C is 0.999781 g/mL and at 0C is 0.999841 g/mL. So clearly ice denser as per that chart. So shouldn't ice sink? Thank you and sorry to bother you.
http://www2.volstate.edu/chem/1110/Density_of_Water.htm

 

[Student100]

Yes, the same chart I posted above my friend. Water density at 9C is 0.999781 and at 0C is 0.999841. So clearly ice denser as per that chart. So shouldn't ice sink? Thank you and sorry to bother you.
http://www2.volstate.edu/chem/1110/Density_of_Water.htm

No, that's all liquid water.

 

[Doc Al]

Yes, the same chart I posted above my friend. Water density at 9C is 0.999781 g/mL and at 0C is 0.999841 g/mL. So clearly ice denser as per that chart. So shouldn't ice sink? Thank you and sorry to bother you.

That chart only shows liquid water densities. No mention of ice. (Water can be liquid at 0°C.)

 

[pscience]

Oh,Water can be liquid at 0°C. that makes sense. Thank you so muchhhhh.