Basic high school chemistry

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Graded Assignment Name: SCI302B: Chemistry | Unit 9 | Lesson 4: Semester Test Date: Graded Assignment Semester Test, Part 2 Answer the questions below. When you have finished, submit this assignment to your teacher by the due date for full credit. (5 points) What is Charles’s law? 1. Score • State the definition of the law in words. • What are the assumptions of Charles’s law? • Write mathematical equations that represent the law. • What can be calculated using Charles’s law? • Using a gas-filled balloon as an example, describe what happens to the gas molecules that behave according to Charles’s law. Answer: (5 points) 2. Draw a structural formula for 3-hexene (C6H12), which has a double bond between the number 3 and 4 carbons in the chain. What class of compound is it, and what feature distinguishes it as that class? Score Answer: © 2009 K12 Inc. All rights reserved. Copying or distributing without K12’s written consent is prohibited. Page 1 of 2 Graded Assignment SCI302B: Chemistry | Unit 9 | Lesson 4: Semester Test (5 points) 3. A calorimeter contains 500 g of water at 25°C. You place a hand warmer containing 200 g of liquid sodium acetate inside the calorimeter. When the sodium acetate finishes crystallizing, the temperature of the water inside the calorimeter is 39.4°C. The specific heat of water is 4.18 J/g-°C. What is the enthalpy of fusion (Hf) of the sodium acetate? (Show your work.) Where necessary, use q = mHf. Score Answer: Your Score © 2009 K12 Inc. All rights reserved. Copying or distributing without K12’s written consent is prohibited. ___ of 15 Page 2 of 2
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