Exp 14: Phase Change

Course

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The first three questions refer to the material you were to read in preparation for the lesson. Questions one and two require you to write a three or four sentence response. Number three is a multiple choice question. Click in the appropriate circle. Questions 4 is your opportunity to suggest what we should emphasize today and how.

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1. Which would have the most energy and why, 30 grams of water at 0o or 30 grams of ice at 0o ?


2.When measuring the amount of energy needed to melt 30 grams of ice:

a. Why must the ice be perfectly dry?

b. Why is water mixed with the ice in order to do this experiment?

c. Why is it so urgent that you begin the experiment immediately after combining the ice and water?



3. Cooling means losing energy. Your body is cooled off by evaporation of sweat. Explain how this works.




4. Below is a space for your thoughts, including general comments about today's lab assignment (what seemed impossible, what reading didn't make sense, what we should spend class time on, what was "cool", etc.):




You may change your mind as often as you wish. When you are satisfied with your responses, click the SUBMIT button.

I received no help from anyone on this assignment.