HW 2 - Homework#2 Holcombe(51055 This print-out should have 24 questions Multiple-choice questions may continue on the next column or page nd all

HW 2 - Homework#2 Holcombe(51055 This print-out should have...

This preview shows page 1 - 3 out of 8 pages.

Homework #2 – Holcombe – (51055) 1 This print-out should have 24 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 00110.0 pointsConsider two closed containers.ContainerX is a 2 L container that contains 0.5 L ofacetone. Container Y is a 2 L container thatcontains 1.8 L of acetone. Both containers andcontents are at 30C. Which of the followingis true? 1.You would need information about theshape of the containers to be able to answerthis question. 2.The vapor pressure in container Y isgreater.3.The vapor pressure in container X isgreater. 4. The vapor pressures in both containers are equal. correct Explanation: 002 10.0 points Which of the following is a restatement ofHenry’s Law? 1.Adding a non-volatile solute to a liquidwill lower its vapor pressure. 2.Heating a solution will decrease the solu-bility of gases dissolved in it. 3. A mixture of two liquids will have a vapor pressure that isn’t equal to either of the pure liquid’s vapor pressures. 4. As the partial pressure of a gas above a liquid increases, the gas’s solubility in that liquid also increases. correct Explanation: Henry’s law, formulated by William Henry is 1803 states: ”At a constant temperature, the amount of a given gas dissolved in a given type and volume of liquid is directly propor- tional to the partial pressure of that gas in equilibrium with that liquid.” 003 10.0 points The vapor pressures of pure carbon disulfideand carbon tetrachloride are 360 and 99.8torr, respectively, at 296 K. What is the vaporpressure of a solution containing 50.0 g of eachcompound? Explanation: 004 10.0 points For gases that do not react chemically with water, the solubility of the gas in water gen- erally (decreases, increases) with an increase in the pressure of the gas and (decreases, in- creases) with increasing temperature. Explanation: An increase in pressure means that you have increased the concentration of gas above the solvent surface, thereby increasing the concentration of the gas in the solvent. In- creasing the temperature will decrease the solubility of the gas. 005 10.0 points The vapor pressure of pure CH 2 Cl 2 (molecu- lar weight = 85 g/mol) is 133 torr at 0 C and the vapor pressure of pure CH 2 Br 2 (molecu-
Image of page 1
) – Homework #2 – Holcombe – (51055)
Image of page 2
Image of page 3

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture