Question

Consider this phase diagram for carbon dioxide 30T- In what phase is COz at 26 atm O gas O solid O liquid iquid Starting from the point described above what phase change would eventually as O condensation O melting O sublimation O vaporization 78.5-564 Temperature("C O deposition denaty the true statements about surface Sension Moleales alog te sutace ofaligid behave dnerereytantose ite buk laid Meany has a lower surface tension than Surface tension increases as the temperature of the liquid nises

Answer 1

a)

T lies between -78.5 and 56.4 therefore, this is either a solid or a gas

P lies between solid only

therefore

this must be solid CO2

b)

if we decrease P --> this follow sa vertical line

so it goes from solid to vapor

this is called sublimation

c)

most ideal --> He > N2 > N2 > CO > NH3

this is mainly because:

dispersion forces > polar > H-bonding

and also because of molar mass presnet