1. Why is a mixture like oil and water not considered a pure substance?
2. If a liquid is held at a pressure where its temperature is lower than the saturation temperature, how should this phase be classified?
3. What is the role of the saturation curve for a pure substance?
Pure substance — definition?
Homogeneous, invariable composition in all phases.
Phases of pure substances?
Compressed liquid, saturated liquid, saturated vapor, superheated vapor.
Saturation temperature — role?
Temperature at which boiling begins at a given pressure.
Critical point — significance?
Phase boundary disappears; liquid and vapor become indistinguishable.
Quality — meaning?
Vapor mass fraction in a saturated mixture.
Thermodynamic tables — main properties?
Enthalpy and entropy.
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