Search found 23 matches

by Amy Wong 1I
Sun Mar 06, 2016 4:03 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Steric and torsional strain
Replies: 2
Views: 328

Re: Steric and torsional strain

Steric strain occurs when atoms are trying to occupy the same space so they bump into each other while torsional strain occurs when carbon to carbon bonds are eclipsed.
by Amy Wong 1I
Sun Mar 06, 2016 3:32 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Steric v Torsional
Replies: 1
Views: 347

Steric v Torsional

What is the difference between steric and torsional strains? Why do some molecules have one type of strain but not the other? How do strains affect conformations?
by Amy Wong 1I
Sun Feb 28, 2016 10:21 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Slow Step Determining Overall Rate
Replies: 1
Views: 395

Re: Slow Step Determining Overall Rate

The slow step is always given to you, so you don't have to try to find out which is the slow step yourself. Orders are not determined by how many bonds there are, but have to do with the coefficients of the reactants.
by Amy Wong 1I
Sun Feb 28, 2016 3:41 pm
Forum: *Alkanes
Topic: nucleophile v electrophile
Replies: 3
Views: 492

Re: nucleophile v electrophile

Nucleophiles are electron rich and are like Lewis Bases, such as OH-. They form new bonds with the extra electrons that they have.
by Amy Wong 1I
Sun Feb 28, 2016 3:28 pm
Forum: *Electrophiles
Topic: Electrophiles vs Nucelophiles
Replies: 2
Views: 402

Re: Electrophiles vs Nucelophiles

Nucleophiles are electron rich and are basically Lewis Bases like OH-. Electrophiles are electron deficient.
by Amy Wong 1I
Wed Feb 03, 2016 10:50 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Work Done on System or By System
Replies: 2
Views: 9867

Re: Work Done on System or By System

When work is negative, then it means that work is done by the system because when the system does work, it loses energy and the volume increases. If work is positive, then the work is being done on the system because the system is absorbing energy and the volume decreases.
by Amy Wong 1I
Sat Jan 23, 2016 2:48 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Heat of Formation
Replies: 1
Views: 242

Heat of Formation

What does it mean for no heat to be lost to the surroundings? Why is it significant to assume this?
by Amy Wong 1I
Sat Jan 23, 2016 2:32 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Equation Help
Replies: 1
Views: 226

Equation Help

Are q and deltaH interchangeable? What do they mean and when do you use each one?
by Amy Wong 1I
Fri Jan 22, 2016 11:31 am
Forum: Calculating Work of Expansion
Topic: Equations Help
Replies: 1
Views: 312

Equations Help

Why do you use w=-PdV when it is irreversible and why do you use w=-nRTLn(V2/V1) when it's reversible?
by Amy Wong 1I
Mon Jan 18, 2016 11:15 pm
Forum: Calculating Work of Expansion
Topic: Internal energy and work
Replies: 2
Views: 468

Re: Internal energy and work

No work is done when volume is constant because work= -P * (the change in volume). When the change of volume is 0, or constant, then work=0. The change in internal energy= work + heat, but when work=0, the change in internal energy is just heat.
by Amy Wong 1I
Fri Jan 08, 2016 6:03 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat and Work
Replies: 2
Views: 414

Heat and Work

What is the difference between heat and work? And how do we distinguish them?
by Amy Wong 1I
Tue Dec 01, 2015 9:38 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: pKa and Ka; pKb and Kb
Replies: 1
Views: 606

pKa and Ka; pKb and Kb

What does it mean if your pKa value is high and your Ka value is low? What does it mean if your pKa value is low and your Ka value is high? Same for pKb and Kb. pKa and Ka; pKb and Kb are always inverses/opposites of each other right? What's the significance of knowing the dissociation constant?
by Amy Wong 1I
Mon Nov 16, 2015 10:12 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K Values
Replies: 1
Views: 303

K Values

When K is small, why can we assume that the change in concentrations for reactants equals 0? What does it mean when K is small?
by Amy Wong 1I
Mon Nov 16, 2015 10:10 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Calculating equilibrium constant
Replies: 1
Views: 391

Re: Calculating equilibrium constant

You have to convert to make them all concentrations or all of them partial pressures, you can't combine the two.
by Amy Wong 1I
Sat Nov 14, 2015 4:34 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers
Replies: 2
Views: 434

Re: Quantum Numbers

How does ml=0 mean that this is the electron with the highest energy?
by Amy Wong 1I
Sat Nov 14, 2015 4:32 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Pressure
Replies: 5
Views: 738

Re: Pressure

Temperature change affects a change in K because when the reaction requires heat then the heating will favor the formation of more products while if the reaction was giving off heat the the heating will favor reactants forming.
by Amy Wong 1I
Mon Nov 02, 2015 5:31 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers
Replies: 2
Views: 434

Quantum Numbers

How do you find the the highest energy electron in an atom? How do you know its quantum numbers, especially for l (the angular momentum quantum) and ml (the magnetic quantum)?
by Amy Wong 1I
Wed Oct 28, 2015 1:52 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Diamagnetic Molecules
Replies: 1
Views: 361

Diamagnetic Molecules

Why are molecules with an even number of electrons not always diamagnetic?
by Amy Wong 1I
Fri Oct 23, 2015 10:11 am
Forum: Ionic & Covalent Bonds
Topic: Lewis Structures
Replies: 1
Views: 302

Lewis Structures

How do you know when to draw the Lewis structures as covalent or ionic without knowing electronegativity numbers, for example when you are given potassium phosphide?
by Amy Wong 1I
Fri Oct 23, 2015 10:08 am
Forum: Hybridization
Topic: Energy Levels and Orbitals
Replies: 2
Views: 417

Energy Levels and Orbitals

What is the difference between an energy level/shell and an orbital? Are they the same?
by Amy Wong 1I
Sat Oct 17, 2015 10:42 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty
Replies: 1
Views: 338

Uncertainty

Which subatomic particle's position can we know for sure? Or with the least uncertainty?
by Amy Wong 1I
Fri Oct 09, 2015 9:24 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Orbitals
Replies: 1
Views: 284

Orbitals

How do orbitals affect electrostatic interactions between the nucleus and electrons? Like how is a s orbital different from a p orbital in respect to how the nucleus and electron interact with each other in those orbitals?
by Amy Wong 1I
Fri Oct 02, 2015 4:18 pm
Forum: DeBroglie Equation
Topic: De Broglie's Equation and Stationary Particles
Replies: 2
Views: 323

Re: De Broglie's Equation and Stationary Particles

If the velocity is 0, then the particle is not moving. Thus the particle cannot be traveling in waves so you can't find the wavelength because it doesn't exist. Right?

Go to advanced search