CHEMISTRY COMMUNITY

Omeed_Partovi_1L

Have you heard about the chemist who was reading a book about helium?
-he just couldn't put it down!

Omeed_Partovi_1L

Can anyone clarify the differences between torsional strain, steric strain, and bond angle strain?

Omeed_Partovi_1L

Yes, it does! Thus, if they asked you to name three constitutional isomers of C6H12, drawing cyclohexane tislef, 1-methylcyclopentane, and 1,2-dimethylcyclobutane would be a valid answer. However, I was also wondering if we would ever be expected to draw all the constitutional isomers for an organic...

Omeed_Partovi_1L

What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
-A ferrous wheel!

Omeed_Partovi_1L

I'm a little confused on how to interpret the graph on p.75 out the course reader. How are there more fraction of molecules with high temperature if the peak is lower on the y-axis than the low temperature's peak, and what exactly do they mean when they say fraction of molecules.

Omeed_Partovi_1L

Who took a bigger L:
USC or me on the Chem midterm??

Omeed_Partovi_1L

I think it's because delta G for a spontaneous process represents the energy that is free to do useful work(at constant temperature and pressure), or in other words Gibb's free energy, when negative, represents the total energy available that can do work on the system. However, if delta G is positiv...

Omeed_Partovi_1L

Why did the liquid smell so good?

-Because it didn't pass gas.

Omeed_Partovi_1L

For the book problems on bond enthalpy, it says the units are in KJ/mol and while this makes intuitive sense, the work in the course reader shows that they're multiplying the mean bond enthalpies by the number of moles of the molecule from the equation. Thus I was wondering why don't the moles cance...

Omeed_Partovi_1L

My TA gave an example where an ice cube was dropped into water in an adiabatic container, and used the equation q=n*detaH(fusion) for the heat to melt and added that to the heat to melt, to find the heat of the system. I was confused on where that equation came from and why exactly we have to add it...

Omeed_Partovi_1L

The reason this happens to work, is because the conversion from kelvin to celsius is linearly related(since you just add 273.15), thus since you are calculating delta t in the problem the change in either Kelvin or Celsius will be the same. However, it is good to still always convert to all the same...

Omeed_Partovi_1L

Yes, every reaction's reversal is just the opposite sign of the original!

CHEMISTRY COMMUNITY

Search found 12 matches

Re: Post All Chemistry Jokes Here

Difference Between torsional strain, steric strain, and bond angle strain

Re: Constitutional isomers

Re: Post All Chemistry Jokes Here

Relationship between k, T, and Ea Graph

Re: Post All Chemistry Jokes Here

Re: Gibbs free energy

Re: Post All Chemistry Jokes Here

Units for Bond Enthalpy Questions

Phase Change Formula

Re: Working with Kelvin/Celsius [ENDORSED]

Re: Phase change