Part II. Multiple choice, continued (3 points each). Name:__________________ Please circle your answer. There is only one correct answer to each question. 52. A mixture of He and Ne at a total pressure of 0.95 atm is found to contain 0.32 mol of He and 0.56 mol of Ne. The partial pressure of Ne is __________ atm. A) 0.60 B) 1.5 C) 1.0 D) 0.35 53. Of the following gases, _____________ will have the greatest rate of effusion at a given temperature. A) NH3 B) CH4 C) Ar D) HCl 54. Which noble gas is expected to show the largest deviations from the ideal gas behavior? A) helium B) neon C) argon D) krypton 55. Together, liquids and solids constitute _______ phases of matter. A) the compressible B) the fluid C) the condensed D) the disordered 56. What is the predominant intermolecular force in liquid CBr4? A) dispersion B) dipole-dipole C) ion-dipole D) hydrogen bonds 57. Of the following substances, ____________ has the highest boiling point. A) H2O B) CO2 C) CH4 D) Kr 58. Of the following substances, ____________ has the lowest boiling point. A) Kr B) Ar C) Ne D) Xe 59. What is the predominant intermolecular force in liquid HBr? A) dispersion B) dipole-dipole C) ion-dipole D) hydrogen bonds 60. The total pressure of a mixture of O2 and N2 is 730 torr. The partial pressure of N2 is 0.78 atm. The partial pressure of O2 is A) 0.18 atm B) 0.22 atm C) 0.26 atm D) 0.78 atm

What does Dalton's Law of Partial Pressures state?

The total pressure exerted in a mixture of non-reacting gases is equal to the sum of the partial pressures of the individual gases.

How is the partial pressure of gas i calculated?

The partial pressure of gas i is calculated as Pi = Xi * P_total, where X*i is the mole fraction of gas i.

What is Graham's Law of Effusion?

The rate of effusion of a gas is inversely proportional to the square root of its molar mass, meaning lighter gases effuse faster.

What are the intermolecular forces in a nonpolar molecule like CBr4?

The predominant force is London dispersion forces due to its symmetrical structure.

What affects the boiling point of a substance according to intermolecular forces?

A higher boiling point is associated with stronger intermolecular forces.

Which noble gas has the highest boiling point among Ne, Ar, Kr, and Xe?

Xe (Xenon) has the highest boiling point due to its larger size and stronger London dispersion forces.

What type of intermolecular force predominates in polar molecules like HBr?

Dipole-dipole interactions are the predominant forces in polar molecules like HBr.

How do you convert pressure from torr to atm?

To convert torr to atm, divide the pressure in torr by 760 to obtain the pressure in atm.

What is the relationship between the size of noble gases and their boiling points?

The boiling point increases with increasing atomic size due to stronger London dispersion forces.

Why do larger noble gases deviate more from ideal gas behavior?

They have greater intermolecular forces, leading to more significant deviations from ideal behavior.