Answer to Question #181289 in General Chemistry for Joshua

Question

6) What phases will exist at 1atm and 70°C?

7) You have ice at 263 K (-10°C) 1.0 atm. What could you do to make the ice sublime?

8) A sample of dry ice (solid CO2) is cooled to 173 K (-100.0°C) and is set on a table at room temperature (298 K; 250 C). At what temperature is the rate of sublimation and deposition the same (assume that pressure is held constant at 1 atm)?

9) Why solid ice is denser that liquid water?

10) If it is impossible to get ant liquid carbon dioxide at pressures less than 5.2 atm, at what pressure does it will happen?

Answer 1

6) Boiling point

7) increase the pressure

9)

Ice actually has a very different structure than liquid water, in that the molecules align themselves in a regular lattice rather than more randomly as in the liquid form. It happens that the lattice arrangement allows water molecules to be more spread out than in a liquid, and, thus, ice is less dense than water.

10) carbon dioxide becomes liquid at 72.9 atmospheres