| What the hell are teachers thinking? | |
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preid1220 NH Moderator
Number of posts : 10749 Username Change Points : 12013 Reputation : 44 Registration date : 2007-11-06 Mood : Country :
| Subject: Re: What the hell are teachers thinking? 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 NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: What the hell are teachers thinking? Tue Oct 20, 2009 10:12 pm | |
| I want to be a pharmacist. | |
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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: What the hell are teachers thinking? Wed Oct 21, 2009 12:12 am | |
| - 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 | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: What the hell are teachers thinking? 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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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: What the hell are teachers thinking? Thu Oct 22, 2009 1:26 am | |
| just read the book ... I hardly remember this stuff ... | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: What the hell are teachers thinking? Thu Oct 22, 2009 7:19 pm | |
| The book doesn't explain calorimetry very good. 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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preid1220 NH Moderator
Number of posts : 10749 Username Change Points : 12013 Reputation : 44 Registration date : 2007-11-06 Mood : Country :
| Subject: Re: What the hell are teachers thinking? Thu Oct 22, 2009 8:21 pm | |
| it's ok Ahmed, just spend some time studying | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: What the hell are teachers thinking? Thu Oct 22, 2009 8:43 pm | |
| Ok that's good advice Pried | |
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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: What the hell are teachers thinking? 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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jj16802 NH Moderator
Number of posts : 8328 Username Change Points : 11227 Reputation : 29 Registration date : 2007-11-30 Mood : Country :
| Subject: Re: What the hell are teachers thinking? Fri Oct 23, 2009 10:45 pm | |
| thats the human race for ya sayf | |
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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: What the hell are teachers thinking? Sat Oct 24, 2009 1:54 am | |
| who the hell asks questions that aren't even in the book?? | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: What the hell are teachers thinking? 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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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: What the hell are teachers thinking? Sat Oct 24, 2009 1:35 pm | |
| college is all about your teacher ... | |
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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: What the hell are teachers thinking? 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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preid1220 NH Moderator
Number of posts : 10749 Username Change Points : 12013 Reputation : 44 Registration date : 2007-11-06 Mood : Country :
| Subject: Re: What the hell are teachers thinking? 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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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: What the hell are teachers thinking? 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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Egyptian Gazelle NH Member
Number of posts : 4703 Username Change Points : 9960 Reputation : 12 Registration date : 2009-10-06 Mood : Country :
| Subject: Re: What the hell are teachers thinking? 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? haha | |
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| Subject: Re: What the hell are teachers thinking? | |
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| What the hell are teachers thinking? | |
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