The conditions that must be met for the substance or matter to have all 6 phases of changes at once are approximately;
- 0.75 Atmospheric Pressure (ATM); and
- 100 Degrees Celsius. See the attached image.
Assume that the point referenced above is called point X, where the
- solid/liquid,
- liquid/gas, and
- solid/gas
lines cross, it is to be noted that this is the triple point, the the only temperature and pressure combination at which all three phases (solid, liquid, and gas) are in equilibrium and may thus exist concurrently.
If the sample is initially at 0 •C and 1.00 attn, and we hold the pressure constant, at approximately what temperature will it melt? At what temperature will it freeze?
If the above condition is achieved, the substance will either melt of freeze at 100 degrees centigrade. This is labelled point Y on the attached image.
If the pressure is raised to 1.50 atm (holding the temperature constant), what phase change will the substance experience?
The phase change that the substance will undergo is condensation, as the substance moves from a gas to a liquid.
What is condensation?
Condensation is the transformation of water vapor into liquid. It is the inverse of evaporation, in which liquid water turns into a vapor.
Condensation occurs in one of two ways: the air is either chilled to its dew point or gets so saturated with water vapor that it cannot retain any more water.
Learn more about phases of matter:
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