Chem Lab C

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Chem Lab C

Post by g-omal » November 9th, 2017, 6:13 am

Consider a Carnot engine (an insulated cylinder with a piston filled with a gas). Why must the cylinder expand during the isothermal phase of the Carnot cycle in which heat flows into the cylinder from a heat source?

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Re: Chem Lab B/C

Post by Nerd_Bunny » January 10th, 2018, 1:19 pm

Seeing as no one has posted here in a while, I'll re-start this.

What are london dispersion forces, and where are they found?
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Re: Chem Lab B/C

Post by dxu46 » January 20th, 2018, 8:29 am

Isn't this only a C event?

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Re: Chemistry Lab C

Post by Tailsfan101 » January 20th, 2018, 8:30 am

dxu46 wrote:Isn't this only a C event?
Be confident in your answers. Say it like this: "This is a C only event."
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Re: Chem Lab B/C

Post by Sleepy » January 20th, 2018, 6:33 pm

Nerd_Bunny wrote:What are london dispersion forces, and where are they found?
London dispersion forces are weak intermolecular forces that form when electrons in two adjacent atoms align in such a way that temporary dipole moments form. They are present between all molecules, but are stronger when the molecules have high polarization.
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Re: Chem Lab B/C

Post by Nerd_Bunny » January 20th, 2018, 6:44 pm

Sleepy wrote:
Nerd_Bunny wrote:What are london dispersion forces, and where are they found?
London dispersion forces are weak intermolecular forces that form when electrons in two adjacent atoms align in such a way that temporary dipole moments form. They are present between all molecules, but are stronger when the molecules have high polarization.
Correct! Your turn.
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Re: Chem Lab B/C

Post by Sleepy » January 20th, 2018, 6:57 pm

Nerd_Bunny wrote:Correct! Your turn.
Q: Name all intermolecular interactions in ammonia (NH3).
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Re: Chem Lab C

Post by UTF-8 U+6211 U+662F » February 9th, 2018, 5:40 pm

(Just to clarify, yes, this is only a C event)

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Re: Chem Lab B/C

Post by Tesel » February 13th, 2018, 6:15 am

Sleepy wrote:Q: Name all intermolecular interactions in ammonia (NH3).
LDFs - occur in all materials.
Dipole interactions - occur because of the partial negative on the lone electron pair and the partial positive on the hydrogen atoms.
Hydrogen bonds - occur specifically because of the N-H bond, special type of dipole interaction.
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Re: Chem Lab B/C

Post by Sleepy » February 14th, 2018, 12:36 pm

Tesel wrote:
Sleepy wrote:Q: Name all intermolecular interactions in ammonia (NH3).
LDFs - occur in all materials.
Dipole interactions - occur because of the partial negative on the lone electron pair and the partial positive on the hydrogen atoms.
Hydrogen bonds - occur specifically because of the N-H bond, special type of dipole interaction.
Correct!
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[size=80][u]MC Barons | Tiger | North Pocono | Regionals | States[/u]
Dynamic: 2 | 14 | 2 | 2 | 9
Remote: 9 | 18 | 2 | 1 | 8
Hydro: 11 | 18 | 3 | 2 | 2
Game On: 3 | 1 | 3 | 1 | 21[/size]
[size=80][u]North Pocono | Regionals | States[/u]
Dynamic: 1 | 2 | -
Remote: 2 | 1 | -
Game On: 3 | 4 | -[/size]

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