Chapter 11, Problem 67c
Indicate whether each statement is true or false: (c) Molecules that exhibit a liquid crystalline phase do so at well-defined temperatures and pressures.
Video transcript
The phase diagram for neon is
Use the phase diagram to answer the following questions. (a) What is the approximate value of the normal melting point?
Use the phase diagram of neon to answer the following questions. (b) What can you say about the strength of the intermolecular forces in neon and argon based on the critical points of Ne and Ar (see Table 11.5.)?
At 25 °C gallium is a solid with a density of 5.91 g/cm3. Its melting point, 29.8 °C, is low enough that you can melt it by holding it in your hand. The density of liquid gallium just above the melting point is 6.1 g/cm3. Based on this information, what unusual feature would you expect to find in the phase diagram of gallium?
For a given substance, the liquid crystalline phase tends to be more viscous than the liquid phase. Why?
As the intermolecular attractive forces between molecules increase in magnitude, do you expect each of the following to increase or decrease in magnitude? (g) critical temperature.
The table below lists the density of O2 at various temperatures and at 1 atm. The normal melting point of O2 is 54 K.
(b) Over what temperature range is O2 a liquid?