Hess's Law

Hess's Law

Today we went over Hess's law. Mrs. Friedmann's thorough and very helpful notes on it can be found here.

Tonight's homework is a webassign if you didn't do it yesterday (due tonight at 11:59) and three handouts on Hess's law (really two, but one is two pages). The first can be found here and the second here, but neither of them can be found here.

The net blogger is: Grace K!

Bond Polarity

The first thing we did in class was go over homework.

Then, most of class time was spent on a partner quiz.

Lastly, we went over some notes on polarity:

There are 2 kinds of polarity

• Bond Polarity
• The electronegativity difference between two atoms
• 0.0-0.4= non polar 0.4-1.7=polar 1.7-infinity=ionic
• Example: ẟ- (partial negative) N <--+ C ẟ+

                                                                      3.0   -    2.5= .5

• The arrow denotes the more electronegative side, while the plus sign indicates the positive side.
• Molecule polarity:
• Will be discussed in webassigns due Sunday night

Homework: Webassigns due sunday

Next blogger: Chris H