Homework Assignment 1: General Chemistry Review (due 2/8/2010)
 Get a General Chemistry text that you may use as a reference for the semester.
 Complete the attached CH141 and CH142 exams (you may consult each other, but must submit your own work). Please turn in a hard copy in class.
Ch142 Final 2000.pdf CH141 Final Exam 2003.pdf
Homework Assignment 2: Room Energy Audit (due 2/15/2010)
Every student will help prepare a Colby student energy audit of electrical appliances used by the student body. Start by claiming an appliance by adding your name to the table below. You may fill in the rest of your row at a later date.
Name 
Appliance 
Energy Consumption (J/year) 
Number on Campus 
Total Energy 

example 
microwave 
3.73 * 10^4 kJ/year 
1077.1 
4.01 * 10^7 kJ 
Sarah 
Cell chargers 



Andy 
Laptop chargers 



Reuben 
Televisions 



Erin 
Hair Straighteners 



Rachael 
Alarm Clocks 



Amy 
Refrigerators 



Devon 
Speakers 






total 

Once you have selected the appliance, survey 10 or more rooms to get a statistical sampling of the appliance frequency on campus. Determine the energy consumed by the appliance over the course of the academic year and compute the total energy consumed by all students using the appliance. Put your data in the table above and provide the details on your appliance and your calculations below. This assignment is only submitted on this page.
Post answers to assignment 1 below: (list name, appliance, and then details)
Steve Jobs, Apple laptop computer
Details on the calculations for computer energy consumption ....
_______________________________________________________________________________________________
Example, Blow Drier

Brand 
Voltage (V) 
Current (A) 
Power (W) 
1 
Jilbere 
125 
10 
1250 
2 
Physique 
125 
15 
1875 
3 
Revlon 
125 
15 
1875 
4 
Conair 
125 
15 
1875 
5 
Perfection Classic 
125 
15 
1875 
6 
Vidal Sassoon 
125 
15 
1875 
7 
Conair 
125 
15 
1875 
8 
Conair 
125 
15 
1875 
9 
Conair 
125 
15 
1875 
10 
Conair 
125 
15 
1875 
Average 



1812.5 
Average Energy Consuption a year assuming 10 minutes daily use.
1812.5 J/sec * 60 sec/min * 10 min/day * 365 day/year = 3.97E8 J
Assuming every female (54.8%) on campus and no males use a blow dryer (some guys have hair driers)
3.97E8 J * 1867 * 54.8% = 4.06E11 J = 4.06E8 kJ