Search found 15 matches

by Juskarun Cheema
Fri Mar 11, 2016 8:23 pm
Forum: *Cycloalkanes
Topic: Cis/Trans on Cycloalkanes
Replies: 1
Views: 459

Cis/Trans on Cycloalkanes

Is there always cis/trans when naming cycloalkanes and, if so, can we only use cis/trans or can we use E/Z as well?
by Juskarun Cheema
Sun Mar 06, 2016 3:42 pm
Forum: *Calculations Using ΔG° = -RT ln K
Topic: Gas Constant
Replies: 1
Views: 803

Gas Constant

Is the gas constant in calories, 1.987 cal/Kxmol, always given or do we have to solve for it using 4.18 J = 1 cal?
by Juskarun Cheema
Sun Feb 28, 2016 7:48 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Arrhenius Equation
Replies: 1
Views: 300

Arrhenius Equation

What does the constant A stand for in the Arrhenius Equation?
by Juskarun Cheema
Sun Feb 21, 2016 7:09 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: pg. 78 of course reader
Replies: 1
Views: 325

pg. 78 of course reader

On page 78 of the course reader, the TA stated during lecture that in a homogenous catalyst reaction, the NO will disappear and reappear in the reaction. What does she mean by this? I am confused because if you make that statement, don't the intermediates NO2 and O disappear and reappear?
by Juskarun Cheema
Fri Feb 05, 2016 11:43 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 14.37
Replies: 1
Views: 424


For part c, why does the Solutions Manual treat Cl2 --> Cl- as an oxidation reaction? In the cell diagram it is shown as a reduction reaction.
by Juskarun Cheema
Sun Jan 31, 2016 3:31 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Redox Reaction (Anode/Cathode Diagram)
Replies: 1
Views: 274

Redox Reaction (Anode/Cathode Diagram)

From lecture on 1/27/16: How does an opening in the electrode affect the transferring of electrons and how does it affect the reaction as a whole?
by Juskarun Cheema
Mon Jan 25, 2016 5:18 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy Calculations (9.1)
Replies: 5
Views: 2653

Entropy Calculations (9.1)

When do you use a negative value for q when calculating entropy? In the solutions for question 9.1, it states that q is negative. Why is this?
by Juskarun Cheema
Mon Jan 25, 2016 11:07 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Reverse vs Forward Reaction
Replies: 1
Views: 393

Reverse vs Forward Reaction

Why is the forward process favored in the gas phase only and why is the reverse process favored in the liquid phase only? (In Reference to Pg. 41 of Course Reader).
by Juskarun Cheema
Sun Jan 17, 2016 3:23 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calculating Work
Replies: 1
Views: 339

Calculating Work


I wanted to know why it is necessary to convert Torr into atm and mL to L when calculating work. Also, are we given the conversion factors/rates from Torr to atm?
by Juskarun Cheema
Sun Dec 06, 2015 11:49 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Final Exam Fall 2012 #8
Replies: 1
Views: 745

Final Exam Fall 2012 #8

Question: An approximation to finding the pH of a solution containing a polyprotic acid is to treat each step independently and add the [H+] generated at each step. Using this apprximation find the pH of a 0.0037 M solution of H2CO3 using the given equations: H2CO3 -> H+ + HCO3- Ka1 = 4.3 x 10^-7 HC...
by Juskarun Cheema
Sun Nov 29, 2015 11:17 pm
Forum: Lewis Acids & Bases
Topic: determining lewis acids and bases
Replies: 2
Views: 452

determining lewis acids and bases

Do you have to draw out the lewis structure to determine if a compound is an acid or a base?
by Juskarun Cheema
Sun Nov 29, 2015 11:00 pm
Forum: Amphoteric Compounds
Topic: How to tell something is amphoteric?
Replies: 4
Views: 2079

Re: How to tell something is amphoteric?

If the compound has both basic and acidic character then it will be amphoteric.
by Juskarun Cheema
Sun Nov 15, 2015 12:16 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Endo vs. Exothermic
Replies: 6
Views: 4470

Re: Endo vs. Exothermic


I have a question regarding these reactions. Is there a way to deduce endothermic vs. exothermic reactions if you're not given the change in heat value?

by Juskarun Cheema
Wed Oct 28, 2015 11:43 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Geometry
Replies: 1
Views: 328

Molecular Geometry

Hi! I was wondering if the molecular shape bent and angular are the same thing? Also, why aren't these two shapes in the course reader notes?
by Juskarun Cheema
Thu Oct 01, 2015 2:43 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: atomic emission vs atomic absorbtion
Replies: 4
Views: 788

Re: atomic emission vs atomic absorbtion

I am a bit confused on whether the spectrum shows the wavelength or whether it shows the frequency emitted by the gas sample.

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