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styrofoam cup used instead of a beaker?

styrofoam cup used instead of a beaker?

Chemistry
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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Why was a styrofoam cup used instead of a beaker?

1 of 2 Molar Heat of Fusion Object: In this experiment, you will determine the change in temperature of a mixture of warm water and ice. From this data, the amount of heat absorbed by the ice can be determined and ultimately, the molar heat of fusion of ice calculated. Procedure: 1. Obtain mass of styrofoam cup. 2. Add 150 g of warm water (~ 30 °C). 3. Obtain mass of cup plus water. Stir the water with thermometer and determine the temperature to the nearest tenth of a degree. 4. Dry 1 ice cube with a paper towel to remove any water, and place the ice immediately in the cup; do not splash any water from the cup. 5. Stir quickly until all the ice is melted, then record the temperature to the nearest tenth of a degree. 6. 7. Determine the mass of the cup and water.
Transcribed Image Text:1 of 2 Molar Heat of Fusion Object: In this experiment, you will determine the change in temperature of a mixture of warm water and ice. From this data, the amount of heat absorbed by the ice can be determined and ultimately, the molar heat of fusion of ice calculated. Procedure: 1. Obtain mass of styrofoam cup. 2. Add 150 g of warm water (~ 30 °C). 3. Obtain mass of cup plus water. Stir the water with thermometer and determine the temperature to the nearest tenth of a degree. 4. Dry 1 ice cube with a paper towel to remove any water, and place the ice immediately in the cup; do not splash any water from the cup. 5. Stir quickly until all the ice is melted, then record the temperature to the nearest tenth of a degree. 6. 7. Determine the mass of the cup and water.
Expert Solution
Step 1

The molar heat of fusion is quantity of heat required to change 1g of solid to liquid without any temperature Change. 

For maintaining , no temperature change in the process, insulator is required.

 Beaker is made up of glass. Though glass is poor conductor of heat ,still there is considerable amount of heat loss to the surrounding.

 

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