Why does dry ice skip the liquid phase?

The temperature of the Earth is also too warm for carbon dioxide to be stable as a solid, so it vaporizes. The process is very similar to boiling, except that the atmospheric pressure is too low to allow carbon dioxide to become a liquid, so it "boils" directly from solid to gas. read more

1 lb of ice at 70 degrees and 14.7 psi atmospheric pressure has a different specific volume. The 1 lb of ice has a greater volume than 1 lb of water. That means ice is less dense than water, because there is more volume and the same mass, so there is less mass per cubic centimeter of volume. read more