Have you heard about the chemist who was reading a book about helium?
-he just couldn't put it down!
Search found 12 matches
- Sun Mar 19, 2017 10:53 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3906994
- Mon Mar 13, 2017 6:43 pm
- Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
- Topic: Difference Between torsional strain, steric strain, and bond angle strain
- Replies: 2
- Views: 5560
Difference Between torsional strain, steric strain, and bond angle strain
Can anyone clarify the differences between torsional strain, steric strain, and bond angle strain?
- Sun Mar 12, 2017 5:27 pm
- Forum: *Cycloalkanes
- Topic: Constitutional isomers
- Replies: 2
- Views: 1876
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...
- Sun Mar 05, 2017 5:29 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3906994
Re: Post All Chemistry Jokes Here
What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
-A ferrous wheel!
-A ferrous wheel!
- Sun Feb 26, 2017 4:18 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Relationship between k, T, and Ea Graph
- Replies: 1
- Views: 550
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.
- Sun Feb 19, 2017 8:45 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3906994
Re: Post All Chemistry Jokes Here
Who took a bigger L:
USC or me on the Chem midterm??
USC or me on the Chem midterm??
- Mon Feb 13, 2017 2:17 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Gibbs free energy
- Replies: 2
- Views: 700
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...
- Tue Feb 07, 2017 7:31 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3906994
Re: Post All Chemistry Jokes Here
Why did the liquid smell so good?
-Because it didn't pass gas.
-Because it didn't pass gas.
- 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: 684
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...
- Tue Jan 24, 2017 8:23 pm
- Forum: Phase Changes & Related Calculations
- Topic: Phase Change Formula
- Replies: 2
- Views: 985
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...
- Sun Jan 22, 2017 1:07 am
- Forum: Calculating Work of Expansion
- Topic: Working with Kelvin/Celsius [ENDORSED]
- Replies: 2
- Views: 801
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...
- Sat Jan 14, 2017 9:32 pm
- Forum: Phase Changes & Related Calculations
- Topic: Phase change
- Replies: 3
- Views: 914
Re: Phase change
Yes, every reaction's reversal is just the opposite sign of the original!