Search found 10 matches

by Myra Kurani 1L
Wed Mar 15, 2017 1:22 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Determine Z or E from a line structure
Replies: 1
Views: 251

Re: Determine Z or E from a line structure

If the 2 constituents with the highest molar mass on each side are on the same side of the line structure, thenn the molecule is a cis molecule and a Z is used to name it. If the 2 constituents with the highest molar mass on each side are on different sides, then it is trans and a E is used to name ...
by Myra Kurani 1L
Thu Mar 09, 2017 7:56 pm
Forum: *Alkanes
Topic: Reaction Profiles
Replies: 3
Views: 361

Re: Reaction Profiles

The problem should specify whether the reaction is exergonic or endergonic. If it is endergonic, the reactants are less than the products. If the reaction is exergonic, the reactants are higher than the products.
by Myra Kurani 1L
Thu Mar 02, 2017 10:21 pm
Forum: *Cycloalkanes
Topic: Drawing Structures
Replies: 1
Views: 226

Re: Drawing Structures

A ring is used when the compound is a "cyclo", but a line structure is used for compounds that have a sufficient number of carbons.
by Myra Kurani 1L
Thu Feb 23, 2017 7:58 pm
Forum: *Enzyme Kinetics
Topic: Intermediates vs. Catalysts
Replies: 1
Views: 230

Re: Intermediates vs. Catalysts

Yes you are correct. Intermediates are produced in the first reaction and then are reactants in the second reaction. However, catalysts are reactants in the first reaction and then products in the second reaction. They speed up the reaction, but are not consumed by the reaction.
by Myra Kurani 1L
Thu Feb 16, 2017 1:13 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1019307

Re: Post All Chemistry Jokes Here

I wanted to tell you a joke about the elements but all the good ones Argon
by Myra Kurani 1L
Thu Feb 09, 2017 10:20 pm
Forum: Balancing Redox Reactions
Topic: Acidic and Basic Solutions
Replies: 2
Views: 252

Re: Acidic and Basic Solutions

I also have a question relating to the difference between acidic and basic solutions. When you are doing a basic redox reaction, can you use hydronium ions to balance the equation and then a the end substitute them for hydroxide ions? So basically, can you do basic redox reactions the same as acidic...
by Myra Kurani 1L
Thu Feb 02, 2017 3:22 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Gibbs free energy for cell rxns: UNITS
Replies: 2
Views: 217

Re: Gibbs free energy for cell rxns: UNITS

I think the units are kJ/mol, but I think J/mol is also correct as long as you convert your numbers correctly.
by Myra Kurani 1L
Wed Jan 25, 2017 10:54 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Pressure vs. Volume [ENDORSED]
Replies: 2
Views: 256

Pressure vs. Volume [ENDORSED]

Why does the equation delta S=nRln(P1/P2) have initial pressure on top when the other equations that contain volume or temperature have final volume or final temperature on top?
by Myra Kurani 1L
Thu Jan 19, 2017 12:52 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calorimeters [ENDORSED]
Replies: 3
Views: 369

Re: Calorimeters [ENDORSED]

A regular calorimeter occurs at a constant pressure because it is an open system, so it occurs at the pressure of the atmosphere. In a bomb calorimeter, volume is constant and it is an isolated system.
by Myra Kurani 1L
Thu Jan 12, 2017 11:41 pm
Forum: Phase Changes & Related Calculations
Topic: Question about Enthalpy
Replies: 4
Views: 346

Re: Question about Enthalpy

According to the textbook, enthalpy allows us to keep track of energy changes only at a constant pressure, so the answer is no I believe.

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