Question

Use phase diagrams to produce a heating cooling curve at a specific pressure.

A) True
B) False

Answer 1

It is true that phase diagrams can be used to produce heating cooling curves at specific pressures. The construction involves identifying the initial phase and drawing a constant pressure line to track phase changes while cooling or heating.

Step-by-step explanation:

The use of phase diagrams can indeed produce a heating cooling curve at a specific pressure. This is true because phase diagrams graph the pressure-temperature conditions under which different phases of a substance can exist. To construct a heating cooling curve:

1. Identify the region of the phase diagram corresponding to the initial conditions and the phase that exists in this region.
2. Draw a line that corresponds to the given pressure. As you move along this line while cooling or heating, you track and describe the phase changes the substance undergoes.

For example, on a phase diagram, you can find the point corresponding to 1 atm of pressure. If you decrease the temperature at this constant pressure, the substance will change from a gas to a liquid, then from a liquid to a solid, marking the various phase change points on the cooling curve.