Problem: Use the phase diagram of neon to answer the following questions.What can you say about the strength of the intermolecular forces in neon and argon based on the critical points of Ne and Ar? (critical temperature (Ar) = 150.9  K, critical pressure (Ar) = 48.0  atm)

FREE Expert Solution

Recall that a phase diagram shows the transition of matter between solid, liquid, and gas phases as temperature and pressure changes.


The critical point is the pressure and temperature at which the liquid and gas phase are indistinguishable (gas and liquid phase ends)


For Neon, critical point: Tc = ~45 K, Pc = ~28 atm

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Problem Details

Use the phase diagram of neon to answer the following questions.

A phase diagram for neon. The x-axis is temperature in Kelvin, ranging from 0 to 100 with intervals of 20. The y axis is pressure in atmospheres, ranging from 10 to the negative thee to 10 to the positive three. The line separating the solid and gas starts at (15, 10^-3), runs through (18, 10^-2), (22, 10^-1), and ends at (24, 0.4). The line separating the solid and liquid is vertical starting at (24, 0.4) running through (24, 10^3). The curve separating the gas and liquid starts at (24, 0.4) and runs through (36, 10), ending at (44, 27). There is a vertical line separating the liquid and supercritical fluid starting at (44, 27) and running through (44, 10^3). There is a horizontal line separating the gas from the supercritical fluid starting at (44, 27) and running through (100, 27).

What can you say about the strength of the intermolecular forces in neon and argon based on the critical points of Ne and Ar? (critical temperature (Ar) = 150.9  K, critical pressure (Ar) = 48.0  atm)

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