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Lab Prep (last one!)

Thermodynamics

This assignment is due before 9 AM, Wednesday, April 29, 2009.

Please type your LAST name:

The following three questions refer to the material you were to read in preparation to 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.

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

1.

IIn the first part of this lab, you will add a sample of an unknown material (mass m_s) to a calorimeter (mass m_cal) containing water (mass m_w). The specific heats of these are c_s, c_cal, and c_w, respectively. The temperature of the sample is initially T_a and that of the water and calorimeter are T_b. You will measure the final temperature of the combined system, T_f. Please derive an equation to find the specific heat of the sample. Type your equation below.

2.

In your own words, what is the difference between heat and temperature?

3.

A bucket of mixed ice and water sits on the floor in a warm room. The ice melts over a period of two hours. During this period, which of the following is true?

The temperature of the water increases steadily

The temperature of the water remains the same

The temperature of the water decreases steadily

It depends on the temperature in the room

Below is a space for your thoughts, including general comments about today's 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.

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