Search found 11 matches

by Cheng-Wei Jan
Fri Mar 11, 2016 11:08 pm
Forum: *Cyclopropanes and Cyclobutanes
Topic: Steric Strain
Replies: 2
Views: 788

Steric Strain

Can someone please explain the idea behind steric strain and how it differs from torsional stain?
by Cheng-Wei Jan
Sun Mar 06, 2016 10:05 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Torsional Strain
Replies: 2
Views: 295

Torsional Strain

Can someone please explain the idea of torsional strain and how it plays a role in the conformation of an organic molecule?
by Cheng-Wei Jan
Tue Feb 23, 2016 1:01 am
Forum: *Nucleophiles
Topic: Alkyl vs Aryl
Replies: 1
Views: 286

Alkyl vs Aryl

What is the difference between Alkyl carbanions and Aryl carbanions?
by Cheng-Wei Jan
Sun Feb 21, 2016 2:50 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Transition Stages
Replies: 1
Views: 313

Transition Stages

During transition stages, why is the amount of energy present in the reaction mechanism so high?
by Cheng-Wei Jan
Sun Feb 14, 2016 9:15 pm
Forum: General Rate Laws
Topic: Ordered Reaction
Replies: 1
Views: 252

Ordered Reaction

Can someone please explain the difference between 1st, 2nd and 0-order reaction?

Thanks!
by Cheng-Wei Jan
Thu Feb 04, 2016 11:53 pm
Forum: Balancing Redox Reactions
Topic: Potentil Difference
Replies: 1
Views: 255

Potentil Difference

Can someone please explain the idea of cell potential difference and how it relates to work/charge?
by Cheng-Wei Jan
Sat Jan 30, 2016 2:41 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Max Potential
Replies: 1
Views: 326

Max Potential

Can you please explain when a cell reaches it's max potential. Does it occur when the potential of the right side of the cell is at its maximum while the potential of the left side of the cell is at its minimum?
by Cheng-Wei Jan
Mon Jan 25, 2016 3:48 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Question 9.30
Replies: 1
Views: 555

Question 9.30

List the following substances in order of increasing molar entropy at 298 K: CO2(g), Ar(g), H2O(l), Ne(g). Explain your reasoning.

Is the logical way to approach this question through the molar mass of each substance? I'm not too sure
by Cheng-Wei Jan
Sun Jan 17, 2016 11:45 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Closed versus Isolated System
Replies: 2
Views: 359

Closed versus Isolated System

In question 8.1, the textbook asks us to identify what kind of system a very-high quality thermos bottle is. Although the thermos bottle should technically not allow any energy to escape the system, in real life, energy will undoubtedly leave the system, however little it may be. So should we consid...
by Cheng-Wei Jan
Sun Jan 10, 2016 4:45 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Homework Problem 8.55
Replies: 1
Views: 1451

Homework Problem 8.55

I'm having trouble applying Hess's Law to this question and solving for the answer. 8.55 Barium metal is produced by the reaction of alu metal with barium oxide. From the standard reaction enthalpies, 2Ba(s) +O2(g)--> 2BaO(s) (delta H)= -1107 kJ 2Al(s) + O2(g)-->Al2O3 (s) (delta H)= -1676 kJ calcula...

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