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1. Why does crushing a solid cause it to dissolve faster?

1. Why does crushing a solid cause it to dissolve faster?

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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2. Fill half of a 50-mL beaker with crushed ice. Then, approximately 10 mL of water to the beaker. Do step 3 while the water is chilling. 3. Label three clean test tubes, 1 to 3. Add a pinch of sodium chloride to each test tube Place the tubes in a test tube rack. 4. Fill half of test tube 1 with ice-cold water. Fill half of test tube 2 with water at roor temperature. Fill half of test tube 3 with boiling water from the beaker. Note: Do step 4 with the test tubes placed in the test tube rack. Do not hold the test tube while pouring boiling water into it. 5. Gently shake the contents of the test tubes by moving the test tube rack back and forth. Note how long it takes the content of each tube to dissolve. Record your observations in Table 2. Data and Observations: Table 1. Effects of Particle Size and Mixing Test Tube Particle Size Mixed Time To Dissolve Observations 3. 4 Table 2. Effects of Temperature Test Tube 1. Temperature Time to Dissolve Observations 4 Questions: 1. Why does crushing a solid cause it to dissolve faster? 2. How does shaking or stirring affect dissolving? N ol and for the exclusive use of SLU. Reproduction, storing in a retrieval system, distributing, uploading or posting online, or transmitting in any form or by any me tonio mechanical, photocopying, recording, or otherwise of any part of this document, without the prior wnitten permission of SLU, is strictly prohibited.
Transcribed Image Text:2. Fill half of a 50-mL beaker with crushed ice. Then, approximately 10 mL of water to the beaker. Do step 3 while the water is chilling. 3. Label three clean test tubes, 1 to 3. Add a pinch of sodium chloride to each test tube Place the tubes in a test tube rack. 4. Fill half of test tube 1 with ice-cold water. Fill half of test tube 2 with water at roor temperature. Fill half of test tube 3 with boiling water from the beaker. Note: Do step 4 with the test tubes placed in the test tube rack. Do not hold the test tube while pouring boiling water into it. 5. Gently shake the contents of the test tubes by moving the test tube rack back and forth. Note how long it takes the content of each tube to dissolve. Record your observations in Table 2. Data and Observations: Table 1. Effects of Particle Size and Mixing Test Tube Particle Size Mixed Time To Dissolve Observations 3. 4 Table 2. Effects of Temperature Test Tube 1. Temperature Time to Dissolve Observations 4 Questions: 1. Why does crushing a solid cause it to dissolve faster? 2. How does shaking or stirring affect dissolving? N ol and for the exclusive use of SLU. Reproduction, storing in a retrieval system, distributing, uploading or posting online, or transmitting in any form or by any me tonio mechanical, photocopying, recording, or otherwise of any part of this document, without the prior wnitten permission of SLU, is strictly prohibited.
CHEMISTRY 2 Procedure: A. Effect of Particle Size 1. Label four clean test tubes, 1 to 4. Using a spatula, obtain a pinch of salt (NaCl) crystals. 1 23 4 2. Put one crystal of NaCl each into test tubes 1 and 2. 3. Crush two crystals of NaCl using a mortar and pestle. Put equal amounts of the powdered NaCl into test tubes 3 and 4. 4. Fill half of each test tube with water. 5. Place test tubes 1and 3 in the test tube rack without shaking. Stir test tubes 2 and 4 6. Note how long it takes the content of each test tube to dissolve, Record your observations in Table 1. B. Effect of Temperature 1. Pour 15 mL of water into a big test tube. Heat the water until it boils, While the water is being heated, do step 2. 3.5 Dronerty of and for the exclusive use of SLU. Reproduction, storing in a retrieval system, distributing, uploading or posting online, or transmitting in any form or by any me actronic, mechanical, photocopying, recording, or otherwise of any part of this document, wilthout the prior written permission of SLU, is strictly prohibited.
Transcribed Image Text:CHEMISTRY 2 Procedure: A. Effect of Particle Size 1. Label four clean test tubes, 1 to 4. Using a spatula, obtain a pinch of salt (NaCl) crystals. 1 23 4 2. Put one crystal of NaCl each into test tubes 1 and 2. 3. Crush two crystals of NaCl using a mortar and pestle. Put equal amounts of the powdered NaCl into test tubes 3 and 4. 4. Fill half of each test tube with water. 5. Place test tubes 1and 3 in the test tube rack without shaking. Stir test tubes 2 and 4 6. Note how long it takes the content of each test tube to dissolve, Record your observations in Table 1. B. Effect of Temperature 1. Pour 15 mL of water into a big test tube. Heat the water until it boils, While the water is being heated, do step 2. 3.5 Dronerty of and for the exclusive use of SLU. Reproduction, storing in a retrieval system, distributing, uploading or posting online, or transmitting in any form or by any me actronic, mechanical, photocopying, recording, or otherwise of any part of this document, wilthout the prior written permission of SLU, is strictly prohibited.
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