Chem Lab C

[g-omal]

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?

[Nerd_Bunny]

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?

[dxu46]

Isn't this only a C event?

[Tailsfan101]

Isn't this only a C event?

Be confident in your answers. Say it like this: "This is a C only event."

[Sleepy]

What are london dispersion forces, and where are they found?

Answer (Click to Show Hidden Text)

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.

[Nerd_Bunny]

What are london dispersion forces, and where are they found?

Answer (Click to Show Hidden Text)

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.

[Sleepy]

Correct! Your turn.

Q: Name all intermolecular interactions in ammonia (NH₃).

[UTF-8 U+6211 U+662F]

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

[Tesel]

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.

[Sleepy]

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!