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LARN 118 C30D2

Start the following in class:

1. .The required focus question, J118A, for today is

  1. Compare the process of effusion to the process of diffusion.
  2. At a given temperature and pressure, is effusion or diffusion faster? Use at least two sentences to explain your reasoning.
  3. State two real life examples of the diffusion of gases, and explain why the noted processes are examples of diffusion.

2. The required focus question, J118B, for today is

Gas pressure is proportional to the average number of molecular collisions impacting a given area per unit time.

  1. Use the particle theory of matter to explain how the total pressure exerted on the walls of a container by a mixture of [ideally behaving] gases is equal to the sum of the partial pressures that each gas exerts independently on the container walls.
  2. State an example to clarify how the total pressure exerted on the walls of a container by a mixture of [ideally behaving] gases is equal to the sum of the partial pressures of each individual gas.

3.a. Use the PQ5R or SQ5R method to prepare study guide for text section 14.4 on Gases: Mixtures and Movements or go to https://socratic.org/chemistry  to research the topics brought up in section 14.4 of your text. .  Read section 14.4 in your chemistry text, pages 432 through 438, and as you do, create a study guide using the SQ5R or PQ5R method explained in class and on the distributed handout packet. You may record vocabulary entries in the body of your study guide, or you may check them off on the chapter 14 vocabulary list that was distributed as you think about the meanings of the terms and add any notations to the vocabulary list for clarifications sake.

3.b.  Study Sample Problem 14.6 on your handouts page 434 and then show your work including all comparison ratios for practice problems I14-31 (In chapter 14, problem 31) and I14-32.

For the Section Assessment 14.4 on page 436, read, analyze, and answer practice problems I14-33 (In chapter 14, problem 33) and I14-34, I14-35, I14-36ab, I14-37, and I14-38 in full sentences.

After you have written your best effort response for each assigned item, check page R94 of the text and check each of those problems that you can by writing in either a check mark (√) or a correction in green ink as we do in class.

Recommended for those who have time left in their 45 minute study period, but not required of all:

1.  Check out the student made Quizlet for chapter 14 at The Behavior of Gases.  Do all the definitions reflect a thorough and correct understanding?
2. Study the Key Concepts given on pages 33, 57, 95, 121, 148, 180, 206, 246, 280, 314, 346, 378, and 406 of the text.
3. Review those concepts that we have discussed in class that are in your study guides, that are in your text study guide at the end of the chapter, and that on the chapter vocabulary sheet provided to you that describes what is a substance, an element, a compound, a coarse mixture, a colloidal suspension, a solution; an atom; a formula unit, a molecule; a phase, an aqueous phase; a chemical change, a physical change; a chemical reaction, a reactant, a product, a word equation, and a formula unit equation; and how are these concepts different? You need to be able to explain the meaning of each of these terms, and be able to differentiate the terms, be able to compare and contrast these related terms, and give examples that make clear the points that you are trying to explain. Go over each of these concepts with your study partner.