Question

heat transfer create your own phase diagram using the following information: for the following questions (#2-5) complete a phase diagram of the substance described below: 1. sketch the phase diagram of substance that has: a triple point at 0.5 atm and 5°c a melting point at 40°c a boiling point at 100°c a critical point at 5.0 atm and 500°c 2. at 1.0 atmospheres, what is the melting point of the substance? 3. at 1.0 atmospheres, what is the boiling point of the substance? 4. if the temperature remains constant at 75°c, what would need to be done in order to change phases from gas to liquid? 5. if the pressure remains constant at 0.5 atmospheres, what needs to be done in order to change phases from a gas to a solid?

Explanation:

1. The given melting point is specified for standard atmospheric pressure (1.0 atm), so this value directly applies.
2. The given boiling point is specified for standard atmospheric pressure (1.0 atm), so this value directly applies.
3. At a constant temperature below the critical point, increasing pressure compresses gas molecules into a liquid phase.
4. At constant pressure equal to the triple point, cooling reduces thermal energy, causing gas to condense then freeze directly or transition to solid via deposition.

Answer:

1. $40^\circ\text{C}$
2. $100^\circ\text{C}$
3. Increase the pressure of the substance.
4. Cool the substance (lower its temperature below $5^\circ\text{C}$).