Home


WarmUp


What is Physics Good For?


Puzzle


Lab Prep


Course Information


Communications


Homework Server
Lab Prep - Thermodynamics

This assignment is due before 9 AM, Wednesday, November 28th, 2007.



Please select your lab section
Wednesday 1-3 PM
Thursday 2-4 PM
Please type your LAST name and first initial (example: Gavrin, A):

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.

In the first part of this lab, you will add a sample of an unknown material (mass ms) to a calorimeter (mass mcal) containing water (mass mw). The specific heats of these are cs, ccal, and cw, respectively. The termperature of the sample is initially Ta and that of the water and calorimeter are Tb. You will measure the final termparature of the combined system, Tf. Please derive an equation to find the specific heat of the sample. Type your equation below.

2.


For each of the following quantities explain why or why not it is dependent upon the pressure at which the experiment is conducted: the heat of vaporization, the boiling temperature, and the specific heat of water.





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.