Label the features of the phase diagram. Pressure (not to scale) liquid-gas equilibrium triple point Pc Answer Bank supercritical fluid solid-gas equilibrium liquid solid-liquid equilibrium Temperature (not to scale) gas solid critical point Tc

The following diagram corresponds to a closed system, comprised of a pure substance. The letter labels closest to the points marked with a dot refer specifically to those points. The other letter labels refer to the region of the graph in which they lie. (See attached graph) A) Match the following: (Assign a letter to each based off the graph)            gas, liquid and solid all may be present at equilibrium           normal gas region           critical point           solid region           normal melting point           normal gas and/or liquid present at equilibrium -- but no solid           supercritical fluid region           normal liquid region           gas and/or solid present at equilibrium -- but no liquid B) For the substance represented by the above phase diagram, at any point at which the solid and liquid are in equilibrium, which phase is less dense? Solid or liquid? C) There is only one known pure substance which, as a liquid, cannot be frozen by cooling alone at 1…

The following statements are related to the molecular nature of T, P, and U. Select all that are True. V Comparing a liquid and gas at the same saturation temperature, molecular kinetic energies are the same. O Comparing a liquid and gas at the same saturation temperature, molecular kinetic energy of the liquid is smaller. O Molar energy of a gas (molecular KE + intermolecular PE) can be equal to molar energy (molecular KE + intermolecular PE) of a liquid for the same substance at the same saturation temperature. O When a pair of molecules is at a distance where the intermolecular potential energy is negative, the intermolecular force is always negative.

Could you help me with #8? I included a picture of the phase diagram that was given.

I don’t understand

From point A to point B, choose one or more of the following, gas is heated solid is heated solid is cooled freezing vaporization melting deposition sublimation liquid is heated gas is cooled liquid is cooled condensation

Label the features of the phase diagram. Answer Bank supercritical fluid triple point solid-liquid equilibrium solid-gas equilibrium solid gas critical point liquid liquid-gas equilibrium Pc Te Temperature (not to scale) Pressure (not to scale)

Determine the temperature and pressure at which gas X would behave as propane. Gas Propane X T (K) 406.8 P (MPa) 8.5 Tc (K) 369.8 405.4 Pc (MPa) 4.25 11.333

Based on the image provided, select the one, or ones, with the least vapor pressure. A & B 275 K A 375 K C