Search found 16 matches

by Sumaiyah I 1E
Wed Mar 09, 2016 11:18 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8017
Views: 1402173

Re: Chemistry Jokes

:)
by Sumaiyah I 1E
Wed Mar 09, 2016 10:31 pm
Forum: Balancing Redox Reactions
Topic: Strong vs Weak Oxidizing Agents
Replies: 2
Views: 2953

Strong vs Weak Oxidizing Agents

I completely forgot how to figure out if a molecule is a strong or weak oxidizing agent, and how to compare them. For example, Midterm Question 7A asks to order the following oxidizing agents by increasing strength under standard state conditions: O2(g), MnO4-(aq), and NO3-(aq). How would one go abo...
by Sumaiyah I 1E
Tue Mar 01, 2016 12:14 pm
Forum: *Alkanes
Topic: Naming Organic Compunds Help
Replies: 1
Views: 289

Re: Naming Organic Compunds Help

Thank you SO much for this!! It helped me out so much!
by Sumaiyah I 1E
Thu Feb 18, 2016 10:48 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Gibb's Energy in Reactions and Kinetics
Replies: 1
Views: 395

Re: Gibb's Energy in Reactions and Kinetics

Gibbs Free energy is usually 0 when the equilibrium constant, k, is equal to 1. This means that neither the products or reactants are favored, and the reaction isn't spontaneous in either direction.
by Sumaiyah I 1E
Thu Feb 18, 2016 10:29 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Favorable Reactions
Replies: 2
Views: 2599

Favorable Reactions

Is being energetically favorable the same thing as being thermodynamically favorable? Also, is there a difference between being energetically favorable and spontaneous?
by Sumaiyah I 1E
Mon Feb 08, 2016 9:37 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Question 2B winter 2011 midterm
Replies: 1
Views: 253

Re: Question 2B winter 2011 midterm

Actually, it has the highest entropy. Think of it this way, if you have a diatomic molecule, it is larger, and as a result it will take less diatomic molecules to fill up a space. However, if you have a monoatomic molecule, it will take more individual molecules to fill up a space. Since more monoat...
by Sumaiyah I 1E
Mon Feb 08, 2016 1:13 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Galvanic Cells
Replies: 2
Views: 470

Galvanic Cells

Do Galvanic cells always have positive cell potentials? Why do they do or don't?
by Sumaiyah I 1E
Sat Feb 06, 2016 5:19 pm
Forum: Balancing Redox Reactions
Topic: Potential difference vs. cell potential
Replies: 1
Views: 206

Re: Potential difference vs. cell potential

Cell Potential is the measure of how much voltage exists between two cells. Potential difference, however, is not a measure, but it's what happens due to the ability of electrons to flow from one half cell to another. Basically, potential difference is what occurs when electrons move between electro...
by Sumaiyah I 1E
Sun Jan 24, 2016 11:48 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Work
Replies: 2
Views: 387

Work

How is work related to the expansion and compression of a system?
by Sumaiyah I 1E
Sun Jan 24, 2016 11:44 pm
Forum: Phase Changes & Related Calculations
Topic: Expansion vs. Compression
Replies: 1
Views: 1711

Expansion vs. Compression

When does a system undergo expansion and when does it undergo compression? And why does this happen?
by Sumaiyah I 1E
Fri Jan 08, 2016 5:47 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy of Sublimation
Replies: 2
Views: 745

Enthalpy of Sublimation

Is the enthalpy of sublimation a combination of fusion and vaporization? I'm super confused on which formula to use, the Hvapor-Hsolid or the Hfus+Hvap?
by Sumaiyah I 1E
Fri Dec 04, 2015 10:33 pm
Forum: Conjugate Acids & Bases
Topic: Strong Acid and Strong Base
Replies: 1
Views: 396

Strong Acid and Strong Base

What does the chemical formula for a reaction between a strong acid and a strong base looks like?
by Sumaiyah I 1E
Mon Nov 16, 2015 8:22 pm
Forum: Ideal Gases
Topic: Partial Pressure on Quiz
Replies: 1
Views: 364

Partial Pressure on Quiz

Which conversion units will we be given on the Quiz this week? For example, will we be given the conversion for Pa to atm, or bars?
by Sumaiyah I 1E
Fri Nov 13, 2015 7:11 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR and Polarity
Replies: 2
Views: 421

VSEPR and Polarity

How does VSEPR shape/structure help determine polarity?
by Sumaiyah I 1E
Wed Oct 28, 2015 1:24 am
Forum: Ionic & Covalent Bonds
Topic: Periodic Trends
Replies: 1
Views: 391

Re: Periodic Trends

The easiest way to figure that out is to compare the electronegativity of Cl and F. Since Cl is less electronegative than F, it is more willing to share its electrons, and as a result PCl5 is more covalent.
by Sumaiyah I 1E
Tue Oct 27, 2015 7:40 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 1
Views: 349

Bond Angles

I know this is pretty basic, but just to be sure, if we have a shape such as a trigonal pyramidal, where the angle is <109.5 degrees, do we have to be more specific? Or can we just leave our answer as <109.5 degrees?

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