Liquid Carbon Dioxide

Click on the correct answer.


1	Dry ice
		is frozen water
		is frozen carbon dioxide
		converts to a gas upon standing
		does not usually melt
		melts at zero degrees Celsius

2	The change from the solid state to the gaseous state is termed
		melting
		boiling
		sublimation
		freezing
		vaporization

3	The simultaneous existence of a liquid, solid and gas of the same substance
		will occur at the "triple point" of the substance
		is unknown
		is not a common occurrence under everyday conditions that we usually see
		is termed "steady state"
		can be demonstrated for the substance carbon dioxide

4	Changes from solid to liquid to gaseous states of a single substance are known as
		chemical changes
		physical changes
		phase changes
		sublimating changes
		induced changes

5	Intermolecular attractions
		keep molecules separated from one another
		are very strong in the case of carbon dioxide
		are broken when dry ice sublimes
		help hold a substance together
		operate in gas, liquid, and/or solid states

6	The triple point
		is a commonly witnessed phenomenon
		is a set of temperature and pressure conditions under which solid, gas, and liquid of a substance all co-exist
		of water exists at ordinary pressure and 100 degrees Celsius
		is seen on a phase diagram
		is an unusual phenomenon

7	The triple point of carbon dioxide
		is at very high temperatures compared to ordinary temperatures
		is at very high pressures
		is at very low temperatures for you and I
		is at very low pressures for you and I
		is at ordinary temperature and pressure

8	Dry ice
		is colder than ice made from water
		contains mainly water but is dry since it doesn't melt
		is just another name for solid carbon dioxide
		does not normally melt
		has a temperature of nearly -79 degrees Celsius

9	The pressure in the container in this demonstration
		is the same as atmospheric pressure
		is less than (lower than) that of atmospheric pressure
		is greater than (above that) of atmospheric pressure



10	In a phase diagram
		pressure is plotted against temperature
		temperature is plotted against pressure
		temperature is plotted against intermolecular attraction
		pressure is plotted against force on the container
		the intersection of three lines is seen