Search found 34 matches

by Cyianna 2F
Sun Mar 11, 2018 9:25 pm
Forum: *Enzyme Kinetics
Topic: Enzymes
Replies: 8
Views: 478

Re: Enzymes

Right, enzymes are a type of catalyst that lower activation energy so the rate is faster.
by Cyianna 2F
Sun Mar 11, 2018 8:40 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Steps
Replies: 3
Views: 128

Steps

How do we determine which step is a slow step and which step is a fast step in a reaction?
by Cyianna 2F
Sun Mar 11, 2018 8:35 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Slowest Step
Replies: 3
Views: 147

Re: Slowest Step

The slowest step is what hinders the reaction, so the rate of reaction can only go as quickly as the slowest step.
by Cyianna 2F
Tue Feb 27, 2018 7:09 pm
Forum: General Rate Laws
Topic: Orders and units
Replies: 3
Views: 138

Orders and units

Why is that each different order type (zero, first, second) has different units? Can someone explain it please?
by Cyianna 2F
Sat Feb 24, 2018 4:50 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: n
Replies: 8
Views: 246

n

what is "n" in terms of kinetics?
by Cyianna 2F
Sat Feb 24, 2018 4:43 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: kinetics
Replies: 5
Views: 256

kinetics

How are kinetics and thermodynamics related?
by Cyianna 2F
Sun Feb 18, 2018 11:41 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: The Daniell Cell
Replies: 4
Views: 126

Re: The Daniell Cell

For galvanic cells, we mainly need to focus on what constitutes as a galvanic cell and the direction of electron flow.
by Cyianna 2F
Sun Feb 18, 2018 11:17 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: redox
Replies: 7
Views: 254

redox

So in an oxidation-reduction reaction, which is the reducing and which is the oxidizing agent?
by Cyianna 2F
Sun Feb 18, 2018 11:13 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Salt Bridge
Replies: 4
Views: 133

Re: Salt Bridge

The salt bridge is used as a link between the half cells of the redox and oxidation reactions. The salt bridge helps maintain the charge as electrons flow from the anode to the cathode.
by Cyianna 2F
Sun Feb 11, 2018 3:10 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Pt (s) [ENDORSED]
Replies: 4
Views: 201

Re: Pt (s) [ENDORSED]

If not stated, then it is assumed that Pt(s) is the metal used for both the anode and cathode.
by Cyianna 2F
Sun Feb 11, 2018 3:08 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Standard Cell Potential
Replies: 4
Views: 410

Re: Standard Cell Potential

Cell potential is the difference between a redox reaction and an oxidation reaction. Redox potential only consists of the reduction from the half reaction in the cathode.
by Cyianna 2F
Sun Feb 11, 2018 2:51 pm
Forum: Balancing Redox Reactions
Topic: nernst eq'n
Replies: 2
Views: 82

nernst eq'n

So I was looking over the nernst equation, and apparently I forgot to write what the terms represent, I know most of them by common knowledge, but I frgot what the "n" means. It's not moles right?
by Cyianna 2F
Sun Feb 04, 2018 1:51 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Delta G not
Replies: 5
Views: 180

Re: Delta G not

It's just a difference of values, the concept of are still the same. I think that it just depends of the conditions of the reaction. I'm not entirely sure though, that's a good question.
by Cyianna 2F
Sun Feb 04, 2018 1:37 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Energy Free to do Useful Work
Replies: 2
Views: 124

Re: Energy Free to do Useful Work

Gibbs free energy is the energy that's left at the end of a reaction. This energy is still considered "useful work" because it's all the available energy that can be used for a specific purpose. Take the process of cellular respiration for example. By using oxygen and glucose, we can creat...
by Cyianna 2F
Sun Feb 04, 2018 1:03 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Equilibrium Value K
Replies: 3
Views: 150

Re: Equilibrium Value K

At equilibrium, K=1; this would represent a reaction at equilibrium, since both the reactants nor products are favored. \Delta G is zero at equilibrium due to the fact that in the equation: \Delta H-T*\Delta S if both enthalpy and entropy equal zero, then there is no change, and \Delta G would be 0.
by Cyianna 2F
Sun Jan 28, 2018 3:13 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Relationship between entropy and spontaneity
Replies: 3
Views: 239

Re: Relationship between entropy and spontaneity

Spontaneity refers to any reaction that favors products over reactants. Because so much energy is used to make the products, there's always going to be a decrease in free energy (Gibbs free energy). That is why \Delta G is negative. Entropy must stay positive (or increase) in order to keep \Delta G ...
by Cyianna 2F
Sun Jan 28, 2018 2:35 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Reversible vs Irreversible
Replies: 2
Views: 123

Re: Reversible vs Irreversible

Right, reversible expansion focuses more on the matter that all heat is used toward work. As far as I've seen, there hasn't been any experiments looking into the matter.
by Cyianna 2F
Sun Jan 28, 2018 2:27 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: CV or CP
Replies: 5
Views: 186

Re: CV or CP

Cv refers to constant volume, whereas Cp refers to constant pressure. If anything, the problem may describe which one you're going to use depending on whether the system is described as isobaric(constant pressure) or Isometric (constant volume).
by Cyianna 2F
Sun Jan 21, 2018 11:59 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: heat capacity
Replies: 2
Views: 101

heat capacity

What's the difference between molar and specific heat capacity?
by Cyianna 2F
Sun Jan 21, 2018 11:44 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Heat and systems
Replies: 3
Views: 159

Heat and systems

How can you tell whether or not heat is being transferred to the system or from the system?
by Cyianna 2F
Sun Jan 21, 2018 11:40 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: System Types
Replies: 7
Views: 245

System Types

Can someone please give me specific examples of each type of system(open, closed, isolated) and why they're that way? It's difficult to grasp the difference between them.
by Cyianna 2F
Thu Jan 11, 2018 1:58 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpy of sublimation
Replies: 3
Views: 119

Enthalpy of sublimation

So in lecture Lavelle explained that the change of enthalpy in sublimation is equal to the sum of enthalpy of fusion and the enthalpy of vapor. Can someone please explain to me why this is so?
by Cyianna 2F
Thu Jan 11, 2018 1:52 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy of Intramolecular Forces
Replies: 3
Views: 337

Re: Enthalpy of Intramolecular Forces

That's a good question! I'm actually curious about that as well. Although Van Der Waal forces are relatively weak and fluctuate due to the movement of electrons, I think energy is still released/absorbed in any phase change.
by Cyianna 2F
Mon Jan 08, 2018 5:47 pm
Forum: Phase Changes & Related Calculations
Topic: Endothermic Reaction
Replies: 10
Views: 766

Endothermic Reaction

In lecture today, Lavelle mentioned the melting of an ice cube being an endothermic reaction. I'm just a tad confused as to why this is?
by Cyianna 2F
Sun Dec 10, 2017 12:26 am
Forum: DeBroglie Equation
Topic: Measurable Values
Replies: 1
Views: 132

Re: Measurable Values

In this case, I'm pretty sure as long as velocity is under the speed of light, it's considered a reasonable value.
by Cyianna 2F
Sun Dec 10, 2017 12:23 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 898149

Re: Post All Chemistry Jokes Here

Sam Smoot 1L wrote:Don't be salty


That was sodium funny! I slapped my neon that one!
by Cyianna 2F
Sun Dec 10, 2017 12:22 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 898149

Re: Post All Chemistry Jokes Here

Let's take all these bad chemistry jokes and Barium.
by Cyianna 2F
Thu Dec 07, 2017 7:35 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: ClF3 Lewis acid/ base?
Replies: 2
Views: 415

Re: ClF3 Lewis acid/ base?

This is correct. Having three Flourine surrounding one Chlorine leaves two electron pairs that's available to be donated. This is because chlorine has a total of 7 valence electrons. So with the three bonding Flourine giving three valence electrons, there has to be 2 more lone pairs in order to give...
by Cyianna 2F
Thu Dec 07, 2017 7:12 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Isoelectrinic
Replies: 2
Views: 160

Re: Isoelectrinic

Isoelectronic ions consist of two molecules that have both the same amount of atoms and valence electrons. In Na+ and F-, since Na loses an electron, it goes into group 18, where it has 8 valence electrons and 10 atoms rather than 11. For F-, adding an electron makes F go into group 18 as well. So t...
by Cyianna 2F
Wed Dec 06, 2017 2:23 pm
Forum: Limiting Reactant Calculations
Topic: Limiting reagent [ENDORSED]
Replies: 3
Views: 226

Limiting reagent [ENDORSED]

I'm still confused as to how to determine which molecule is the limiting reagent. How do I find the ratio in order to determine which molecule would be the limiting reagent?
by Cyianna 2F
Sat Dec 02, 2017 8:31 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Molecular Orbital Theory
Replies: 4
Views: 219

Re: Molecular Orbital Theory

Since there wasn't any mention of MO theory during lectures or on the online site, I don't believe there will be any specific questions regarding this.
by Cyianna 2F
Sat Dec 02, 2017 8:26 pm
Forum: Hybridization
Topic: Pi Bonds
Replies: 2
Views: 165

Pi Bonds

What does it mean when a pi bond is delocalized?
by Cyianna 2F
Sat Oct 28, 2017 5:34 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: d orbital [ENDORSED]
Replies: 2
Views: 179

d orbital [ENDORSED]

Why do elements in the d orbital begin with 3d instead of 4d, since the d orbital begins in the 4th period?
by Cyianna 2F
Tue Oct 10, 2017 5:36 pm
Forum: Administrative Questions and Class Announcements
Topic: weekly online discussion?
Replies: 1
Views: 152

Re: weekly online discussion?

You have the post correct, seeing as you've just posted a question. For each post, you get one point that counts towards your grade. You can only have a maximum of 2 points per week, but you'll come to find that you're posting more than twice on this page. The week ends on Sunday 11:59 pm, and then ...

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