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    What the hell are teachers thinking?

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    preid1220
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    Re: What the hell are teachers thinking?

    Post by preid1220 on Tue Oct 20, 2009 9:58 pm

    Ahmed IV wrote:Becasue Im not a failure. It's true that it is currently hard for me but I'm no quitter.

    don't push yourself to hard man, sometimes you need to stop and take a second look


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    Ahmed
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    Re: What the hell are teachers thinking?

    Post by Ahmed on Tue Oct 20, 2009 10:12 pm

    I want to be a pharmacist.


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    Re: What the hell are teachers thinking?

    Post by Doc on Wed Oct 21, 2009 12:12 am

    Ahmed IV wrote:I feel like crying Sad

    I did so freaking horrible first marking period in AP Chem Sad

    I got a freaking 80 (Really an 82 which got lowered down to a 80)!

    I need serious help!

    Sayf please tell me the difference between a Bomb Calorimetry and a Constant-Pressure (Coffee-Cup) Calorimetry

    Is q(soln) the same as Delta H?

    What is enthalpy?

    PLEASE ANSWER. I am lost in this area of Chem!!

    P.S.: Do I need to memorize the formulas of the 2 calorimetry questions and the Specific heats of the substances?

    specific heat will usually either be given to you, or you will have to calculate it .. and yeah, you're going to have to memorize those formulas ... no way around it ...

    and no, q(soln)is not the same as ΔH ... but -qsoln = qrxn and qrxn/mol = ΔHrxn

    ΔH = the change of enthalpy ...

    Also ΔH = qp

    H = enthalpy

    this should help ... just read the book and learn how to do the problems lol
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    Ahmed
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    Re: What the hell are teachers thinking?

    Post by Ahmed on Wed Oct 21, 2009 5:27 pm

    Sayfullah wrote:
    Ahmed IV wrote:I feel like crying

    I did so freaking horrible first marking period in AP Chem

    I got a freaking 80 (Really an 82 which got lowered down to a 80)!

    I need serious help!

    Sayf please tell me the difference between a Bomb Calorimetry and a Constant-Pressure (Coffee-Cup) Calorimetry

    Is q(soln) the same as Delta H?

    What is enthalpy?

    PLEASE ANSWER. I am lost in this area of Chem!!

    P.S.: Do I need to memorize the formulas of the 2 calorimetry questions and the Specific heats of the substances?

    specific heat will usually either be given to you, or you will have to calculate it .. and yeah, you're going to have to memorize those formulas ... no way around it ...

    and no, q(soln)is not the same as ΔH ... but -qsoln = qrxn and qrxn/mol = ΔHrxn

    ΔH = the change of enthalpy ...

    Also ΔH = qp

    H = enthalpy

    this should help ... just read the book and learn how to do the problems lol

    Well I would except that the book just gives examples of 2 very EASY questions of the type of questions....but their HW questions are hard.

    Also they explain very bad.

    Last question: What is the difference between ΔH and ΔE?
    Also lets say a reaction has a ΔH of +123 KJ

    Its enthalpy would be -123 KJ, correct (since energy is conserved)?


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    Re: What the hell are teachers thinking?

    Post by Doc on Thu Oct 22, 2009 1:26 am

    just read the book ... I hardly remember this stuff ...
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    Re: What the hell are teachers thinking?

    Post by Ahmed on Thu Oct 22, 2009 7:19 pm

    The book doesn't explain calorimetry very good. :S

    Well thanks anyways, I took the quiz and I think I did pretty good. But I still have a test next week.


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    Re: What the hell are teachers thinking?

    Post by preid1220 on Thu Oct 22, 2009 8:21 pm

    it's ok Ahmed, just spend some time studying


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    Re: What the hell are teachers thinking?

    Post by Ahmed on Thu Oct 22, 2009 8:43 pm

    Ok that's good advice Pried Wink


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    Re: What the hell are teachers thinking?

    Post by Doc on Fri Oct 23, 2009 10:06 pm

    studying is useless when the class average is 40%!!! in other words, my chem teacher is retarded ... shouldve taken the 8 am TR class but nooooo .. i didnt want to wake up early twice a week ...
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    Re: What the hell are teachers thinking?

    Post by jj16802 on Fri Oct 23, 2009 10:45 pm

    thats the human race for ya sayf


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    Re: What the hell are teachers thinking?

    Post by Doc on Sat Oct 24, 2009 1:54 am

    who the hell asks questions that aren't even in the book??
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    Re: What the hell are teachers thinking?

    Post by Ahmed on Sat Oct 24, 2009 9:38 am

    Sayfullah wrote:who the hell asks questions that aren't even in the book??

    My chem teacher (sometimes)


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    Re: What the hell are teachers thinking?

    Post by Doc on Sat Oct 24, 2009 1:35 pm

    college is all about your teacher ...
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    Re: What the hell are teachers thinking?

    Post by Doc on Mon Dec 07, 2009 5:28 pm

    ok someone explain this:

    on the latest chem test ... the average was 50 .. and someone actually scored 100 (i think it was some girl who needed just this class to go to med school) and the lowest score was a 0 ... WTF????
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    Re: What the hell are teachers thinking?

    Post by preid1220 on Mon Dec 07, 2009 5:31 pm

    Sayfullah wrote:ok someone explain this:

    on the latest chem test ... the average was 50 .. and someone actually scored 100 (i think it was some girl who needed just this class to go to med school) and the lowest score was a 0 ... WTF????

    it's not impossible


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    Re: What the hell are teachers thinking?

    Post by Doc on Mon Dec 07, 2009 5:57 pm

    preid1220 wrote:
    Sayfullah wrote:ok someone explain this:

    on the latest chem test ... the average was 50 .. and someone actually scored 100 (i think it was some girl who needed just this class to go to med school) and the lowest score was a 0 ... WTF????

    it's not impossible

    ???

    but does it make sense???

    some kid got a 5 too lol
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    Re: What the hell are teachers thinking?

    Post by Egyptian Gazelle on Mon Dec 07, 2009 7:14 pm

    Sayfullah wrote:ok someone explain this:

    on the latest chem test ... the average was 50 .. and someone actually scored 100 (i think it was some girl who needed just this class to go to med school) and the lowest score was a 0 ... WTF????
    There are some really really dumb people in this world and some really really smart people in this world......does it make sense now? Razz haha


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