13. Liquids, Solids & Intermolecular Forces

The critical point of this substance occurs at what temperature?

Arrow I corresponds to:

What is the normal freezing point of this unknown substance?

At what temperature can we no longer tell the difference between the liquid and gas phases?

Based on the phase diagram shown below, how will the melting point of the substance change if the pressure is increased above 1 atm?

In the phase diagram for water, indicate the direction that the solid–liquid and liquid–gas coexistence lines will move along the temperature axis after the addition of solute.

A gaseous substance turns directly into a solid. Which term describes this change?

The boiling temperature and its relationship to the system exist in the ____.

Which term describes the process by which water vapor changes to the liquid state?

Starting from the lower triple point, what action(s) would produce liquid carbon?

Starting from the lower triple point, what action(s) would produce liquid carbon?

What does water undergo when it turns to gas from liquid on surface of a sidewalk?

What is it called when water vapor up in the sky becomes liquid water?

Changes of phase most always require _________.

Substance A melts at 350 °C, substance B melts at 580 K, and substance C melts at 650 °F. What is the correct order of the melting point temperatures of A, B, and C from lowest to highest?

In each of the following regions of a generic phase diagram is it possible for the liquid to be the most stable phase?

a. pressures greater than the critical pressure

b. temperatures greater than the critical temperature

c. pressures less than the pressure of the triple point

d. temperatures less than the temperature of the triple point

a. Of the three conventional states of matter—solid, liquid and gas—which two have the most similar densities?

b. In a typical phase diagram, which boundary is the least affected by changes in pressure, the vapor pressure curve, the melting curve, or the sublimation curve?

c. Is there a correlation between your answers to parts (a) and (b)?