Search found 12 matches

by Omeed_Partovi_1L
Sun Mar 19, 2017 10:53 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011284

Re: Post All Chemistry Jokes Here

Have you heard about the chemist who was reading a book about helium?
-he just couldn't put it down!
by Omeed_Partovi_1L
Sun Mar 12, 2017 5:27 pm
Forum: *Cycloalkanes
Topic: Constitutional isomers
Replies: 2
Views: 525

Re: Constitutional isomers

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...
by Omeed_Partovi_1L
Sun Mar 05, 2017 5:29 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011284

Re: Post All Chemistry Jokes Here

What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
-A ferrous wheel!
by Omeed_Partovi_1L
Sun Feb 26, 2017 4:18 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Relationship between k, T, and Ea Graph
Replies: 1
Views: 222

Relationship between k, T, and Ea Graph

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.
by Omeed_Partovi_1L
Sun Feb 19, 2017 8:45 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011284

Re: Post All Chemistry Jokes Here

Who took a bigger L:
USC or me on the Chem midterm??
by Omeed_Partovi_1L
Mon Feb 13, 2017 2:17 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Gibbs free energy
Replies: 2
Views: 335

Re: Gibbs free energy

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...
by Omeed_Partovi_1L
Tue Feb 07, 2017 7:31 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011284

Re: Post All Chemistry Jokes Here

Why did the liquid smell so good?

-Because it didn't pass gas.
by Omeed_Partovi_1L
Thu Feb 02, 2017 2:59 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Units for Bond Enthalpy Questions
Replies: 2
Views: 326

Units for Bond Enthalpy Questions

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...
by Omeed_Partovi_1L
Tue Jan 24, 2017 8:23 pm
Forum: Phase Changes & Related Calculations
Topic: Phase Change Formula
Replies: 2
Views: 418

Phase Change Formula

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...
by Omeed_Partovi_1L
Sun Jan 22, 2017 1:07 am
Forum: Calculating Work of Expansion
Topic: Working with Kelvin/Celsius [ENDORSED]
Replies: 2
Views: 350

Re: Working with Kelvin/Celsius [ENDORSED]

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...
by Omeed_Partovi_1L
Sat Jan 14, 2017 9:32 pm
Forum: Phase Changes & Related Calculations
Topic: Phase change
Replies: 3
Views: 457

Re: Phase change

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

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