Showing posts with label Energy and Phase Change. Show all posts
Showing posts with label Energy and Phase Change. Show all posts

Sunday, May 8, 2016

Second Phase Lesson

The second lesson had much more information than the first, and was pack with memorizing graphs and flow charts.
To start, we went through the flow chart to determine what kind of inter and intramolecular forces were within a compound.
This is the flow chart that we followed, and we went over being polar and how hydrogen bonding examples needed to make FONCLs (phone calls).
http://schoolbag.info/chemistry/central/central.files/image1460.jpg
We then went to look at examples that determined what state a compound was in, thus making us determine if the intramolecular force was covalent or ionic, and what the intermolecular force was based on the flow chart.
Next we looked at various curves so we could see the differences in phase changes. This is similar to what ours looked like.
https://writer.zoho.com/image.do?imgurl=43f284c1e0ba6646e2d2a98b8a52495191ec6d7cf7d22a0458f6d938d98b4eb1a7800cecd6ac3d9ca48373fdd0cecca6
We then looked at phase diagrams and did situations to where the compound would be.
http://www.kentchemistry.com/images/links/matter/Phase.gif

Here are some extra links for practice:
http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch14/phase.php
http://www.sciencegeek.net/APchemistry/APtaters/PhaseDiagrams.htm
https://www.khanacademy.org/test-prep/mcat/chemical-processes/covalent-bonds/a/intramolecular-and-intermolecular-forces

New Energy Phase Unit

Lately in Chemistry, we have gone over the Unit of phase changes where we have gone through the bonding forces as well as the physical properties between the different phases. First we went over the differences in energies, where kinetic is in motion. Also, and important thing to remember was energy lost=energy gained.
Next we learned about end and exothermic processes.
Here is a picture demonstrating how endothermic take in energy and exothermic release energy
https://dr282zn36sxxg.cloudfront.net/datastreams/f-d%3Adf0a2687d885c997ec852a60b09181c51b0a234ada9136e0288d4e8c%2BIMAGE_THUMB_POSTCARD%2BIMAGE_THUMB_POSTCARD.1
The last big part of this lesson was the formula Q=Mc(Tf-Ti)
to plug into this formula, you must know that Q is heat in joules, m is mass in grams, c is specific heat in (J/g C), and T is change in temp.
This shows the process:

https://i.ytimg.com/vi/0jKHtBJNAYM/maxresdefault.jpg
https://i.ytimg.com/vi/vQ6VIHqfVLc/hqdefault.jpg

Here are some more links for practice and understanding of this: