Colligative-Properties-of-Electrolytes-vs-Nonelectrolytes-and-Introduction-to-Thermodynamics (2).doc

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GENERAL CHEMISTRY 2FIRST QUARTERModule 3Colligative Properties of Electrolytes vsNonelectrolytes, and Introduction toThermodynamicsMost Essential Learning Competency:Differentiate the colligative properties of nonelectrolyte solutionsand electrolyte solutionsCalculate boiling point elevation and freezing point depression fromthe concentration of a solute in a solutionCalculate molar mass from colligative property dataDescribe laboratory procedures in determining the concentration of solutionsExplain the first law of thermodynamicsExplain enthalpy of a reactionCalculate the change in enthalpy of a given reaction using Hess Law12written byMr. Edd VillamorTala High SchoolTo the Learners
Almost everything around you involves chemistry. From the things you eat to the clothes you wear,the air you breathe, and the ground you walk on, even the emotions from a heartbreak: all of these thingsinvolve chemistry. But to better appreciate chemistry lessons, you need to follow some simple rules:1.Read the directions very carefully and follow the directions indicated in every activity.2.Create amental imageof the concepts that are being discussed. This will help you betterunderstand abstract concepts in chemistry.3.Perform all of the activities in this module in the correct sequence. Doing this will help youscaffold your way up to more challenging tasks.4.Imagine your answer and compare it with the mental image of the concept you just learned.This will help you check your work. If your imagination fails, you may use the answer key cardin assessing your work, with the help of your facilitator or guardian.5.Look for real-world examples of the concepts you have learned. This will make chemistryconcepts more real to you and will also help you appreciate it more.6.Have fun learning chemistry!This module will cover several topics. The first part will be a continuation of the discussion aboutthe colligative properties of solutions. The second part will be an introduction to thermodynamics: the firstlaw of thermodynamics, enthalpy of reaction, and Hess Law.DIRECTIONS: Read the questions very carefully and write the letter of the correct answer on the spaceprovided before each number.

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