Search found 23 matches

by Wesley_Rugen_1E
Sun Mar 19, 2017 1:12 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: k'
Replies: 4
Views: 589

Re: k'

It doesn't have anything to do with the differentiation of the rate constant. It is just the reverse rate - we can use it to find K.
by Wesley_Rugen_1E
Sun Mar 12, 2017 6:46 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907516

Re: Post All Chemistry Jokes Here

Organic chemistry is really difficult. Those who study it have alkynes of trouble.
by Wesley_Rugen_1E
Sun Mar 05, 2017 10:15 pm
Forum: *Electrophiles
Topic: Rxn steps
Replies: 1
Views: 476

Rxn steps

How do you know which step of an organic reaction will occur first (nucleophile or electrophile)? Or do these steps occur simultaneously?
by Wesley_Rugen_1E
Thu Feb 23, 2017 11:15 pm
Forum: *Electrophiles
Topic: BF3
Replies: 2
Views: 349

BF3

Why is BF3 considered an electrophile?
by Wesley_Rugen_1E
Sun Feb 19, 2017 9:55 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907516

Re: Post All Chemistry Jokes Here

Since we are studying kinetics:

In a sports relay race, a chemical kinetics specialist runs slowly, and his group loses the race.

When the chemical kinetics specialist is asked why he ran slowly, his reply was "I always wanted to be the significant rate determining step."
by Wesley_Rugen_1E
Sun Feb 12, 2017 1:23 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907516

Re: Post All Chemistry Jokes Here

Why did the acid go to the gym? To get buffer. Two atoms were walking down the street one day, when one of them exclaimed. "Oh no - I've lost an electron!" "Are you sure?" the other one asked. "Yes," replied the first one, "I'm positive." How do you pick out a...
by Wesley_Rugen_1E
Sun Feb 05, 2017 4:17 pm
Forum: Balancing Redox Reactions
Topic: Intensive property
Replies: 4
Views: 382

Intensive property

Can someone explain why standard reduction potential is an intensive property, versus an extensive property? I'm still confused as to why standard reduction potential is considered a intensive property.
by Wesley_Rugen_1E
Fri Jan 27, 2017 12:24 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Entropy when P isn't constant
Replies: 1
Views: 203

Entropy when P isn't constant

In the textbook, the entropy change when P is not constant is given by:

delta S = nRln(P1/P2)

Why would the initial pressure be on top, rather than the final pressure?
by Wesley_Rugen_1E
Thu Jan 26, 2017 11:55 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isothermal?
Replies: 2
Views: 356

Re: Isothermal?

An isothermal reaction just means that during the reaction, T (temperature) stays the same, or is constant. That means delta T (change in T) equals zero. R is the gas constant, which Dr. Lavelle gives us on the formula sheet, so you don't have to memorize the values, but be aware that depending on t...
by Wesley_Rugen_1E
Thu Jan 19, 2017 8:55 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: HW 8.57
Replies: 2
Views: 373

HW 8.57

The question asks to determine the reaction enthalpy for the hydrogenation of ethyne to ethane, C2H2(g) + 2H2(g) -> C2H6(g). What happens when we hydrogenate something? What do we add to the equation?
by Wesley_Rugen_1E
Tue Jan 10, 2017 8:39 pm
Forum: Calculating Work of Expansion
Topic: How to achieve maximum work from an electric battery?
Replies: 4
Views: 355

How to achieve maximum work from an electric battery?

In the book, a thinking point asks how to achieve maximum work from an electric battery. I'm having trouble conceptually solving this question. Would we increase the external pressure?
by Wesley_Rugen_1E
Thu Dec 01, 2016 11:43 pm
Forum: Bronsted Acids & Bases
Topic: Weak Acid
Replies: 4
Views: 561

Re: Weak Acid

The bond strength is a large determining factor for acidity. The bond between HF is very strong, because fluorine does not want to let go of hydrogen.
by Wesley_Rugen_1E
Tue Nov 22, 2016 7:11 pm
Forum: General Science Questions
Topic: Why can't hydrogen ions exist by themselves?
Replies: 1
Views: 1052

Why can't hydrogen ions exist by themselves?

Why can't hydrogen ions exist by themselves?
by Wesley_Rugen_1E
Mon Nov 21, 2016 12:35 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Is a negative pH possible? [ENDORSED]
Replies: 2
Views: 350

Is a negative pH possible? [ENDORSED]

When asked to determine the pH, is it ever possible to get a negative pH?
by Wesley_Rugen_1E
Sun Nov 13, 2016 9:19 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: MO Diagram
Replies: 1
Views: 220

MO Diagram

If we have a heteronuclear molecule with one atom with less than 8 electrons, and the other with more than 8 electrons, which MO diagram will we use?
by Wesley_Rugen_1E
Sat Nov 12, 2016 9:41 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 81
Views: 51830

Re: Reading the textbook [ENDORSED]

I read the book and find it helps a lot when understanding difficult topics. They can use different symbols which can be confusing, but overall it helps me out a lot. Also doing the self-tests when going through the reading give me confidence when learning the content.
by Wesley_Rugen_1E
Sun Nov 06, 2016 5:30 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907516

Re: Post All Chemistry Jokes Here

What is the chemical formula for seawater?

CH2O
by Wesley_Rugen_1E
Sun Oct 30, 2016 5:20 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907516

Re: Post All Chemistry Jokes Here

A photon checks into a hotel and is asked if he needs any help with his luggage. He says, "No, I'm traveling light."
by Wesley_Rugen_1E
Fri Oct 21, 2016 4:24 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 907516

Re: Post All Chemistry Jokes Here

Chemists...

You have to keep an ion them.
by Wesley_Rugen_1E
Sun Oct 16, 2016 4:48 pm
Forum: General Science Questions
Topic: Does 10 inches of snow equal 1 inch of rain?
Replies: 1
Views: 861

Does 10 inches of snow equal 1 inch of rain?

I read somewhere a while back that 10 inches of snow equals 1 inch of rain. If so, how does that work?
by Wesley_Rugen_1E
Sat Oct 08, 2016 10:39 pm
Forum: Einstein Equation
Topic: 1.27 [ENDORSED]
Replies: 1
Views: 443

1.27 [ENDORSED]

Q: A lamp rated at 32W (1W = 1J/s) emits violet light of wavelength 420nm. How many photons of violet light can the lamp generate in 2.0s? How many moles of photons are emitted in that time interval? So for the first part, it would be 64J. From there, I used E=hv and v=c/wavelength to get E=hc/wavel...
by Wesley_Rugen_1E
Thu Sep 29, 2016 5:22 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: 1.57 [ENDORSED]
Replies: 5
Views: 774

1.57 [ENDORSED]

Lines in the Balmer series of the hydrogen spectrum are observed at 653.6, 486.1, 434.0, and 410.2 nm. What is the wavelength of the next line in the series?

I am totally lost on this question. How would I find the wavelength of the next line in this series?

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