Intermolecular Forces
The forces of attraction between molecules of Cl₂ are?
London forces
What is the name given to the process when solvent molecules surround solute molecules?
Solvation
Which phase change is exothermic?
Condensation
What is the critical point?
Specific temperature and pressure at which the distinction between a liquid and gas phase of a substance disappears
The freezing point of a solution with 0.31 mol sucrose in 175 g of water is?
-5.4°C
The forces of attraction between molecules of I₂ are?
London forces
What is the mole fraction of water in a water-ethanol solution that is 54% water by mass?
0.46
The mass of water that must evaporate to dissipate 1.7 × 10⁵ J of heat from the body is?
75.2 g
The vapor pressure of diethyl ether is 401 mmHg at 18°C. What is its vapor pressure at 32°C?
530 mm Hg
The percent Na₂CO₃ by mass in a 1.50 molal aqueous solution is? Molar mass is 105.99g/mol
11.6%
Among N₂, H₂, and CO, which has the highest boiling point?
CO
The number of grams of oxalic acid dihydrate needed to prepare 250.0 mL of 1.25 M solution is?
43.6 g
The amount of heat released to convert 20.0 g of mercury vapor at 387°C to liquid at 307°C is?
6.56 kJ
A 500.0 mL sample of water contains 692 μg of lead. What is the concentration in ppm?
4.0 ppm
The mole fraction of ethanol in a solution with 46 g ethanol and 64 g methanol is?
0.42
Among HF, HBr, HCl, and HI, which has the highest boiling point?
HF
A concentrated H₂SO₄ solution is 65% by mass and has a density of 1.55 g/mL. What is its molality?
18.9 m
The triple point of I₂ occurs at 0.12 atm and 115°C. What does this mean?
Liquid I₂ cannot exist under these conditions
The vapor pressure of a solution with 115 g of urea in 485 g of water at 25°C is?
23.3 mm H
The vapor pressure of a solution containing a nonvolatile solute is directly proportional to
Mole fraction of solvent
Among covalent solids, molecular solids, metallic solids, and ionic solids, which generally shows electrical conductivity?
Metallic solid
A 1.0 g protein sample (MW = 50,000 g/mol) is dissolved in 50.0 mL of water. What is its osmotic pressure at 25°C?
7.4 mmHg
In a certain mountain range, water boils at 95.0C. What is the atmospheric pressure under these conditions, in mm Hg? The heat of vaporization, ∆H vap for H2O is 44.0 kJ/mole, and the normal boiling point of H2O is 100.0C.
628 mm Hg
Sparkling wine is bottled under 4.0 atm of CO₂ pressure, where CO₂ solubility is 0.68 g/100 g H₂O. After opening, at 4.0 × 10⁻⁴ atm, what is the new solubility?
5.1 × 10⁻⁶ g/100 g H₂
Which choices increase gas solubility in a liquid?
Increasing pressure & decreasing temperature