Intro to Chemistry Kinetic Molecular Discussion


Homework Assignment #8

Chapter 8.2-8.3; 9.1-9.2 Due: Monday, November 2 by 11:59 pm

  1. True or False. Gases are highly compressible.


  1. According to the Kinetic Molecular theory, why do gases have low densities?


  1. True or False. The volume of the gas inside a balloon is the same as the volume of the balloon.


  1. Boyle’s Law explains which of the following?
  2. how hot air balloons float
  3. why compressed air canisters must be kept cool
  4. how breathing works
  5. why the tire air pressure may change when the seasons change
  6. True or False. The volume and temperature of an ideal gas are directly proportional if amount and pressure are constants.


  1. True or False. Intermolecular forces (IMFs) are present and may affect the behavior of nonideal (“real”) gases.


  1. What is the pressure (in atm) of 0.0255 moles of gas if it has a volume of 105.2 mL at a temperature of 45 °C? Hint: R = 0.08206 (L·atm)/(mol·K)


  1. What is volume (in L) of 1.29 moles of gas at a temperature of 285 K and a pressure of 0.924 atm? Hint: R = 0.08206 (L·atm)/(mol·K)





  1. For each pair of covalent compounds, which one is expected to be more soluble in water and why?
  2. C2H6 vs. C2H5OH
  3. CH2F2 vs. H2
  4. PH3 vs. NH3

10.) For each ionic compound, predict whether it should be soluble or insoluble in water and explain why.

  1. LiF
  2. Cu(NO3)2
  3. Ni(OH)2
  4. K3PO4
  5. True or False. The solubility of most solid solutes in water decreases with increasing temperature.
  6. How many mL of a 3.00% w/v H2O2 solution are needed to provide 15.0 g H2O2?




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