Thursday, October 10, 2013

Matter & Energy Quiz

Directions: You may need to use the reference tables to determine some values

and formulas. All work including formulas and substitution needs to be shown for any calculations.  The final answer should be rounded to the correct significant figures.  SHOW YOUR WORK.

Convert the following temperatures.
1.  50.o C =   ___________K         
2. melting point Hg= ____________ K  =   ___________oC

3.   Which of the following samples has the lowest average kinetic energy? (circle)

a.       5g Fe(s) at 5 K    

b.       10g Cu(s) at 0oC     

c.       1g Co(s) at 273K 

d.       50g Al(s) at  100oC

4.   What is the total amount of heat absorbed by 100. grams of water when the 

      temperature changes from 16.0oC to 20.0oC?

5.  Assuming the energy released into the water in question 4 originated from a  

    15.0g sample of sodium acetate as it crystallizes, what is the experimental  

     heat of crystallization (Hc) for sodium acetate?


Thursday, October 3, 2013

Dr Bein in for Dr Perry

Welcome.  I hope we have a productive time together.  I have posted my notes here for you to use.
Notes for Mater and Energy unit
This is a link to an online chemistry textbook.  This includes links to videos and is good coverage of the topics.  This book has more information than we need here, even for the honors classes.  So, just go to the topics covered and realize that there may be topics that you will not be responsible for, just like any textbook.