Question 1
Consider the phase diagram shown. Choose the statement below that is TRUE.
◦ The line separating the solid and liquid phases represents the Δ
vapH.
◦ The solid phase of this substance is higher in density than the liquid phase.
◦ The triple point of this substance occurs at a temperature of 31 °C.
◦ At 10 bar of pressure, there is no temperature where the liquid phase of this substance would exist.
Question 2
Consider the phase diagram below. If the dashed line at 1 atm of pressure is followed from 100 to 500 °C, what phase changes will occur (in order of increasing temperature)?
◦ fusion followed by vaporization
◦ sublimation followed by deposition
◦ condensation followed by vaporization
◦ vaporization followed by deposition
◦ No phase change will occur under the conditions specified.
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