Please help with 1&2 Chem 105-OnlineSafety:Remember, Hot glass looks the same as cold glass!!! You will also want to ensure that the tubingused does not come into contact with the heating element. The tubing will also get VERY hot.Steam carries more energy at the same temperature than boiling water-so use of hot hands andprecautions is a must! With the use of hot hands, please be sure that if you are using a flame touse additional caution.Prelab:1. Is freezing endothermic or exothermic? Explain what is happening on the molecular level.2. Is vaporization endothermic or exothermic? Explain what is happening on the molecularlevel.Procedure: Part A-Heat of Fusion.1. Obtain the mass of your coffee cup calorimeter.2. Fill the foam cup about 3/4 full with tap water and determine the mass of the water asmw on the data sheet.3.Set up the foam cup, beaker, and the thermometer as shown.4. Lower the thermometer into the water (to about 1.0 cm from the bottom).5. Obtain the initial temperature of the water. This is T1 in your data table.6. Obtain about 5-6 small ice chunks if crushed ice. If you are working with cubes, I shouldbe sufficient. If the ice does not melt, redo the trial with less ice so it sufficiently melts.7. Shake excess water from the small ice cubes or dry them with a paper towel, then addthem to the water. Obtain the mass of the ice by massing by difference. You wantapproximately 10grams of ice.9.8. Stir gently with the thermometer the temperature. Take readings every 30 seconds.When the ice is completely melted, stir the mixture one more time and note thistemperature as the final temperature, T2.10. Use the balance to obtain the mass of the cup + water + melted ice. Record this value.11. Subtract T₁-T₂ to determine AT, the change in water temperature. Record this value.12. Subtract the mass of the cupwater, from the cup + water + melted ice to obtain themass of the ice. Record this value in as (mi).13. The total amount of heat energy lost by the water (Q2) is equal to the amount of heatenergy absorbed by the ice as it melted (Q3), plus an additional amount of energyrequired to bring the temperature to equilibrium (Q₁). In other words, Q1 represents theenergy needed to raise the temperature of the melted ice water to the finaltemperature.

Answer: When during a process system releases the energy then such process is called as exothermic…

Answered: 1. Is freezing endothermic or…

1. Is freezing endothermic or exothermic? Explain what is happening on the molecular level 2. Is vaporization endothermic or exothermic? Explain what is happening on the molecular level.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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