Monday, February 10, 2014

2/2 to 2/8

Blog Reflection by Raymond Zhao
In, the past week we learned about  equilibrium.This included learning about the special properties of reactions like how they are affected by temperature and pressure. Some important formulas were 
 and Kp=Kc(RT)^delta(n)

 Also, the unique properties of certain reactio were taught from experiemtns. Another important idea was the types of reactions: exo and endothermic. The properties of the reaction will determine how the reaction will shift when other factors are changed. The pogils and packets and the book all really helped my understanding of equilibrium. I really liked how the packets take me step by step and If I have a question I can ask my table group.
    All these ideas about equilibrium can be connected by the different ideas I learned already like the different thermodynamic ideas. The earlier lectures and activities all greatly help me come to a understanding of the ideas this week because it established a good base for it. Thus, I rate the difficulty regarding last week about a 7/10. This is because it was challenging, but not such much that it can't be learned. I still wonder how to calculate K for reactions by changing other reaction's. They don’t make too much sense to me.Since that this my only question from last week, I'd say that my understanding is 9.5/10.
    Likewise, my participation was a good 9.5/10 too. I asked question and actively learned. Because of my good participation, my understanding was good.
    I feel fairly confident in memorization capabilities for learning trends.  But, I still need to work on memorizing on all the visualizations because I sometimes forget. For example, I don’t really get the idea of K much. The concepts taught in last week have made me feel more confident about equilibrium. I now know the concepts a lot more clearly and I know how to find all the important properties.
    Overall, the past week has been great. I learned a lot. Activities such as worksheets and white boarding greatly helped my understanding and development. I loved the time with groups to work together because it allowed interaction with each other. I feel like this helped me the most.

Monday, January 20, 2014

Blog Reflection 1/21/14



Gas Laws were taught Last week:

Boyle’s Law P1V1 = P2V2
Charles’s Law V1 / T1 = V2 / T2
Gay-Lussac's Law P1 / T1 = P2 / T2
Avogadro's Law V1 / n1 = V2 / n2
The Combined Gas Law P1V1 / T1 = P2V2 / T2
The Ideal Gas law PV = nRT
Dalton's Law of Partial Pressures Ptotal = Pa + Pb + Pc + …
van der Waals equation
Density of a Gas D=m/V
Graham’s Law r1/r2= sqrt (M2/M1)
Partial Pressure Pa= (P total)( mole fraction)
The average kinetic Energy of a Single Gas molecule KE=(½)mv^2
Molecular weight M=mRT/PV
Speed of molecules V rms=sqrt(3RT/M)


These laws all contribute to a greater understanding of the behavior of Gases. When used together, these laws allows scientists to find the speed of molecules, density, volume, pressure, temperature, number of moles, and many more things from just a few known characteristics. This is what makes these laws so great. Each law connects with each other like how Boyle’s Law, Charles’s Law and Gay lussac’s law makes the The combined Gas Law. Also, I’m a very mechanical thinking person. I really like like how these laws are “plug and chug.” In other words, the relationships are very straightforward and do not need super deep logical thinking because you can just use the formulas.  

I am  confident in my understanding of Gas laws. It would be about a 9.5/10. Like I said before, I really like straightforward, mechanical calculations. If I am given all the needed variables I can calculate the unknown. However, I did have some problems when I was given a longer problem which required multiple steps. I get really confused on those types. Luckily, there was a lot of whiteboarding and there was even a dry ice day. These activities helped me see what all the numerical variables meant in real life so I could make a faster and better connection. What also helped was that I participated with my table group during discussions and that I activity asked questions. I would rate my participation a 9.5/10 as well.
Unfortunately, I am still confused on multiple step problems. On the taskchain and chemistry worksheets, I do not know what to do because there is no clear path (By clear path I mean it is not as straightforward like finding V2 if T1, T2, and V1 is given). I think to fix this, I should just do more problems to get more experience.

After learning about Gas Laws, I am much more aware of my environment. I know why balloons slowly shrink, why dry ice makes things become tiny, and why heating something causes it to grow. I now wonder if any Gas laws like PV=nRT works on solids or liquids when the constant R is changed.