triple point at 153°C: rhombic monoclinic liquid gas this is not a triple point 000 (c) What phase is stable at room temperature and 1.0 atm pressure? Orhombic monoclinic Ⓒliquid gas (d) Can monoclinic sulfur exist in equilibrium with sulfur vapor? ○ Yes O No (e) What are the normal melting point and normal boiling point of sulfur? normal melting point °℃ °℃ normal boiling point (f) Which is the denser solid phase, monoclinic or rhombic sulfur? O monoclinic sulfur Orhombic sulfur

The vapor pressure of ethanol (C2H5OH) at 19 °C is 40.0torr. A 1.00-g sample of ethanol is placed in a 2.00 L containerat 19 °C. If the container is closed and the ethanolis allowed to reach equilibrium with its vapor, how manygrams of liquid ethanol remain?

A chemist determined vapor pressures of an unknown substance at different temperatures. The data was plotted as ln(P) vs 1/T (temperature in Kelvin). What is △H∘vap of this substance in kJ/mol?

Labelling a typical simple phase diagram.

Four liquids are described in the table below. Use the second column of the table to explain the order of their freezing points, and the third column to explain th order of their boiling points. For example, select '1' in the second column next to the liquid with the lowest freezing point. Select '2' in the second column next to the liquid with the next higher freezing point, and so on. In the third column, select '1' next to the liquid with the lowest boiling point, '2' next to the liquid with the next higher boiling point, and so on. Note: the density of water is 1.00 g/mL. solution freezing point boiling point 3.6 g of calcium chloride (CaCl2) dissolved in 300. mL of water (choose one)v (choose one) v (choose one) (choose one) 3.6 g of propylene glycol (C3H8O2) dissolved in 300. mL of water 3.6 g of glucose (C6H1206) dissolved in 300. mL of water 300. mL of pure water (choose one) 4(highest) く (choose one) 1(lowest) x 5

Use the following vapor pressure data to answer the questions: Liquid Ag Ni Vapor Pressure, torr Temperature, °C 10 1540 10 2090 (1) In which liquid are the attractive forces the weakest ? (2) Which liquid would be expected to have the highest heat of vaporization?

d• Using the phase diagram to the right, select all of the statements that are false. f Te Temperature (not to scale) Point G is the Critical Point. The substance is a supercritical fluid at Point F Decreasing the pressure of the substance at constant Temperature from point A, will result in vaporization Cooling the substance at Point F will induce condensation There is an equilibrium in the gaseous and liquid states at Point E. Increasing the temperature at constant pressure from Point A will results in two phase changes in the substance. Pressure (not to scale)

Labelling a typical simple phase diagram.

Pentane C5H12 boils at 360C at 1 atmosphere pressure. What is the molar heat of vaporization in kJ/mol if the vapor pressure of pentane at 250C is 505 torr?

$ 4 R F [Review Topics] Refer to the following phase diagram (not to scale!) for neon: P atm 26.2 1 1.00 V 0.425 Choose all that apply T Kelvin A sample of neon at a pressure of 1.00 atm and a temperature of 26.3 K is heated at constant pressure to a temperature of 51.6 K. Which of the following are true? 5 The liquid initially present will solidify. The final state of the substance is a gas. The sample is initially a solid. One or more phase changes will occur. The sample is initially a liquid. T G 244 24.5 E B Cengage Learning Cengage Technical Support 6 MacBook Air Y H 27.1 44.4 & 7 N U J 8 M D-II 1 K ( 9 H 4 [References] O ) O L P 18 command A . ; option { [ Previous + ? 11 ✰ ✰ O Next> Save and Exit Ne X 1 delete 1: S + Update V D (?