Search found 14 matches

by Anthony Rosas 2K
Fri Mar 11, 2016 11:29 pm
Forum: *Cyclopropanes and Cyclobutanes
Topic: Electrophile/Nucleophile CO2
Replies: 1
Views: 783

Re: Electrophile/Nucleophile CO2

It is an electrophile. This is because the two Oxygen atoms are pulling electrons from the central carbon atom. This causes the carbon atom to have a partial positive charge which is the characteristic of an electrophile.
by Anthony Rosas 2K
Sat Mar 05, 2016 7:09 pm
Forum: *Aldehydes
Topic: Carbonyl Functional Group
Replies: 1
Views: 634

Carbonyl Functional Group

Is carbonyl the general name for the aldehyde and ketone functional groups or are aldehydes and ketones separate functional groups?
by Anthony Rosas 2K
Fri Feb 26, 2016 9:23 pm
Forum: *Alkanes
Topic: Things in Parenthesis
Replies: 1
Views: 261

Re: Things in Parenthesis

The parentheses are used in the condensed formula to identify repeating units. In order to figure out which unit goes with which one needs to number the carbons in he carbon chain. For example on the first compound given, (CH3)2 is attached to the first C that is not in parenthesis. The units in par...
by Anthony Rosas 2K
Fri Feb 19, 2016 8:13 pm
Forum: *Complex Reaction Coordinate Diagrams
Topic: Entropy
Replies: 2
Views: 758

Re: Entropy

Entropy is spontaneity. So when two atoms are bonded, they are less free. Hence, there is less spontaneity and entropy decreases.
by Anthony Rosas 2K
Fri Feb 12, 2016 10:33 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Pre equilibrium Approach
Replies: 1
Views: 283

Re: Pre equilibrium Approach

The steady state method can only be used if the first step of a reaction is much slower than the second step, whereas the pre-equilibrium approximation requires the first step to be faster.
by Anthony Rosas 2K
Fri Feb 05, 2016 2:26 pm
Forum: Balancing Redox Reactions
Topic: Balancing Redox Reactions
Replies: 3
Views: 12981

Re: Balancing Redox Reactions

When balancing a redox-reaction you use H2O to balance the oxygens. For example: EQUATION: Br- + MnO4- ---> Br2 + Mn2+ STEP 1 (evaluate the charges): Br-=(-1)|[Mn=(+7),O=(-2)]||Br2=(0)|Mn2+=(+2) STEP 2 (separate the half reactions/balance electrons): 2Br- - 2e- ---> Br2 MnO4- + 5e- ---> Mn2+ STEP 3 ...
by Anthony Rosas 2K
Fri Jan 29, 2016 9:39 pm
Forum: Phase Changes & Related Calculations
Topic: Heat curve problem 1 in page 10 of workbook
Replies: 4
Views: 521

Re: Heat curve problem 1 in page 10 of workbook

You're thinking about trends you've seen. Maybe that's the case usually, maybe not, but you cannot generalize. Look at the actual heating curve given in the question. Heat capacity is the energy required to raise the temperature of any substance by 1 degree C, or whatever the units of temperature yo...
by Anthony Rosas 2K
Thu Jan 21, 2016 10:03 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Homework Help 8.14
Replies: 1
Views: 182

Homework Help 8.14

Hey can you help me please. I don't know what the change in volume or pressure is. I can't find the value of work. Any help will be much appreciated. I know that delta u equals q plus w. "14.) A laboratory animal exercise on a treadmilll that was connected to a weight with a mass of 275g throug...
by Anthony Rosas 2K
Fri Jan 15, 2016 7:15 pm
Forum: Calculating Work of Expansion
Topic: Work of expansion sign
Replies: 1
Views: 295

Re: Work of expansion sign

If a gas is expanding, you can imagine the gas in a chamber pushing on the piston that is lid to the chamber. Since the gas is pushing the lid up, it is using energy. When the gas uses energy it is also losing total energy so the work done by the gas is negative.
by Anthony Rosas 2K
Sat Jan 09, 2016 9:45 pm
Forum: Phase Changes & Related Calculations
Topic: State and Path functions
Replies: 1
Views: 231

Re: State and Path functions

Typically, when the variable (i.e. "T" for temperature or "P" for pressure) are capital letters they're state functions. If the variable is a lower case (i.e. "q" for heat or "w" for work) it is a path function.
by Anthony Rosas 2K
Sun Dec 06, 2015 5:55 pm
Forum: Student Social/Study Group
Topic: Missing Course Reader (Lakretz 110)
Replies: 1
Views: 2824

Missing Course Reader (Lakretz 110)

After taking the final, I went to get my course reader from the back table on the left side and it was no longer there. The name on the course reader is "Anthony Rosas" section "4H" TA "RJ". If found please return to Anthony vista room 350A. Thank You!
by Anthony Rosas 2K
Fri Nov 27, 2015 12:54 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VIDEO - Molecular Geometry
Replies: 1
Views: 294

VIDEO - Molecular Geometry

Molecular Geometry (Anthony Rosas 4H and Emilie Flores 3H)
by Anthony Rosas 2K
Sun Oct 11, 2015 9:54 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity Relationship of C and N.
Replies: 1
Views: 673

Re: Electron Affinity Relationship of C and N.

Electron affinity of group 6 elements tends to be less than that of group 7 elements because of the trend in the periodic table for election affinity is to increase going across a period and increase going up a group. However in groups 4 and 5 electron affinity decreases. The electron affinity of gr...
by Anthony Rosas 2K
Fri Oct 02, 2015 6:26 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Atomic Spectra
Replies: 2
Views: 431

Re: Atomic Spectra

The absorption and emission spectra for Hydrogen are different because hydrogen atoms emit or absorb radiation only on certain frequencies. Since the hydrogen emission spectrum only reveals 3 lines in the visible light section, one can infer that the hydrogen atom can only emit radiation at those sp...

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