explain the following on the basis of the behavior of atoms and/or ions.?

Question

dry ice does not have a normal boiling point under normal atmospheric conditions, even though carbon dioxide is a liquid in fire extinguishers.

Answer 1

Under normal conditions, the temp is so high, and the pressure so low, the dry ice sublimates. Under increased pressure, the co2 vapor can be made to be a liquid. To find out the exact temperature and pressure, you would need to look at a phase diagram for co2.

Answer 2

I'm not sure what you mean by a "normal" boiling point. At normal temperatures and pressures, CO2 is a gas. If you compress/chill CO2 to the point it solidifies, as "dry ice," and then remove the pressure, it will sublimate - change to a gas without passing through a liquid phase. If you simply pressurize it, at some point it will become liquid, which is what you have in fire extinguishers, and may have soon in dry-cleaning machines. CO2 is the smallest and strongest carbon-bond molecule.

Answer 3

On the basis of the behavior of atoms we van say that at ambient temperature kinetic energy of CO2 molecules prevails over attractive forces .