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LARN 117 C30D1

Start the following in class:

1. The required focus topics, J117, for today is

  1. Explain what is meant by saying that two variables are directly proportional to one another.  Give and example of such variation from mathematics class.
  2. Explain what is meant by saying that two variables are inversely proportional to one another.  Give an example of such variation from mathematics class.
  3. State Charles’ law in its simplest algebraic form.
  4. Explain how the equation for Charles’ law in its simplest algebraic form shows whether the relationship between the variables in Charles’ law are directly or inversely proportional.
  5. State Boyle’s law in its simplest algebraic form.
  6. Explain how the equation for Boyles’ law in its simplest algebraic form shows whether the relationship between the variables in Boyle’s law are directly or inversely proportional.
  7. Compare and contrast Charles’ Law to Boyle’s Law.

2.a. Use the PQ5R or SQ5R method to prepare study guide for text section 14.3 on Ideal Gases or go to https://socratic.org/chemistry  to research the topics brought up in section 14.3 of your text.  Rea section 14.3 in your chemistry text, pages 426 through 431, 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.

2.b.  Writing in blue or black ink, place your hand in number in a circle followed by your name in the upper right white space of a piece of three holed composition paper that hasn’t been written on.  Place the page reference for the problems to be considered to the left of the red marginal line on the first blue line.  Centered on the first blue line,write a descriptive title for the learning activity such as Section [chapter #.section#] Responses.  Before you write your response to each question or problem listed below, write its designation to the left of the red marginal line as listed below, followed by your response in ink to the right of the marginal line.

Study Sample Problem 14.5 on your handouts page 427 and then show your work including all comparison ratios for practice problems I14-23 (In chapter 14, problem 23) and I14-24.

Note: Although problems involving numbers of moles of gas molecules, n, can be solved using the method of comparison ratios using information about the properties of an ideal gas at STP, they can more directly be solved by substituting each given quantity (number of measurement units followed by the symbol for the unit of measure) and R in the same units into the ideal gas equation, P·V = n·R·T, and then by solving for the remaining variable.

For the Section Assessment 14.3 on page 429, read, analyze, and answer practice problems I14-25 (In chapter 14, problem 25) and I14-26, I14-27, and I14-30 in full sentences, and show your work including all comparison ratios for practice problem I14-28 and I14-29.

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. Review the SI prefixes and their meanings until you can readily explain the meaning of each listed SI prefix as a numerical multiplier.
2. Think about the fifteen properties of covalent molecular substances listed on the Properties to be understood worksheet describing differences in the properties of metals, ionic compounds, covalent network solids, and covalent molecular compounds. Continue to study this handout for understanding and review how the typical properties of members of these classes of compounds depend on whether the compound has localized or delocalized electrons, and upon whether strong metallic, ionic, or covalent bonding or weak van der Waals forces of attraction are predominant between representative particles of the substances. Try to understand how each property of a given covalent molecular substance is related to the groups of covalently bonded atoms that form molecules whose van der Waals attractive forces only weakly attract other molecules.