## Search found 30 matches

Sun Mar 18, 2018 8:33 pm
Forum: *Cycloalkanes
Topic: SN2
Replies: 1
Views: 1152

### SN2

How many steps are there in an SN2 reaction.
Sun Mar 18, 2018 8:30 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: microstate and expansion
Replies: 1
Views: 265

### Re: microstate and expansion

I think so.
Sun Mar 18, 2018 8:24 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Conductor
Replies: 1
Views: 226

### Re: Conductor

When all the substances are aqueous, so you need a solid conductor. You usually place it on the end.
Sun Mar 11, 2018 11:57 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Equilibrium constant
Replies: 3
Views: 426

### Equilibrium constant

What does the equilibrium constant equal to for a multi-step reaction?
Sun Mar 11, 2018 11:52 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Ways to approach reaction mechanism
Replies: 2
Views: 198

### Re: Ways to approach reaction mechanism

Could someone also explain the pre-equilibrium method.
Sun Mar 11, 2018 11:50 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Replies: 3
Views: 214

Adsorption is the adhesion of molecules on to the surface of something, and they basically form a film over the surface of the catalyst.
Sun Mar 04, 2018 10:04 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Rate determining reaction
Replies: 3
Views: 238

### Rate determining reaction

Do we need to know the rate determining step and the normal step of a certain reaction?
Sun Mar 04, 2018 9:55 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: oxidizing power
Replies: 2
Views: 212

### Re: oxidizing power

The higher their reducing potentials, the stronger their oxidizing power.
Sun Mar 04, 2018 9:53 pm
Forum: General Rate Laws
Topic: Rate equations
Replies: 3
Views: 288

### Rate equations

Do we need to know the derivations for all the rate equations?
Sun Mar 04, 2018 9:49 pm
Forum: First Order Reactions
Topic: half-life
Replies: 2
Views: 215

### Re: half-life

This is because the half-life of a first order reaction is a constant.
Fri Feb 23, 2018 11:37 am
Forum: First Order Reactions
Topic: Reaction order
Replies: 4
Views: 341

### Reaction order

How do you determine the order of a certain reaction?
Thu Feb 22, 2018 10:39 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Electrolytic Cells
Replies: 1
Views: 190

### Re: Electrolytic Cells

Yes, it is possible to produce gas in a electrolytic cell and the gas is usually produced at the anode.
Thu Feb 22, 2018 10:36 am
Forum: Balancing Redox Reactions
Topic: Gibbs free energy of half reactions
Replies: 4
Views: 384

### Gibbs free energy of half reactions

Can we add the Gibbs free energy of the half reactions to find the Gibbs free energy of the final reaction.
Sun Feb 18, 2018 4:26 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Electrode potential
Replies: 1
Views: 180

### Electrode potential

Are all electrode potentials negative?
Sun Feb 18, 2018 4:22 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Nernst equation
Replies: 4
Views: 387

### Nernst equation

What is the Nernst equation?
Sun Feb 18, 2018 4:18 pm
Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Topic: Electrolyis
Replies: 3
Views: 373

### Re: Electrolyis

Not much. But I think you need to know the reactions.
Sat Feb 10, 2018 7:48 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Standard potential [ENDORSED]
Replies: 1
Views: 104

### Standard potential[ENDORSED]

Does the electrode standard potential depend on the molar equation?
Sat Feb 10, 2018 7:44 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Oxidation
Replies: 4
Views: 181

### Oxidation

Does oxidation take place at the anode or cathode in a galvanic cell?
Mon Feb 05, 2018 9:34 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Delta G equal Zero [ENDORSED]
Replies: 4
Views: 339

### Re: Delta G equal Zero[ENDORSED]

No, I don't thing so. When delta G is zero is just means that there are equal amounts of products and reactants.
Fri Feb 02, 2018 10:19 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Exergonic [ENDORSED]
Replies: 5
Views: 288

### Exergonic[ENDORSED]

What are some examples of exergonic reactions?
Fri Feb 02, 2018 10:15 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Micro states
Replies: 5
Views: 312

### Micro states

What are microstates?
Sun Jan 28, 2018 5:14 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Boltzmann Equation Clarification
Replies: 3
Views: 172

### Re: Boltzmann Equation Clarification

The equation shows how the distribution of molecules, atoms or ions in their various energy levels depend on the temperature of the system.
Sun Jan 28, 2018 5:09 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Entropy [ENDORSED]
Replies: 4
Views: 296

### Entropy[ENDORSED]

Is entropy a state function?
Wed Jan 24, 2018 5:40 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Heat capacity question
Replies: 5
Views: 471

### Re: Heat capacity question

I think R refers to the gas constant
Sat Jan 20, 2018 11:49 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity Properties
Replies: 3
Views: 201

### Re: Heat Capacity Properties

Since the definition of heat capacity is the amount of heat required to change the temperature of one unit of mass of a substance by one degree. It is therefore an intensive property because it has mass in its units. Since specific heat is always measured for one unit of mass of the substance the ma...
Thu Jan 18, 2018 8:25 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Why is using bond enthalpies the least accurate method of finding reaction enthalpies?
Replies: 5
Views: 5339

### Re: Why is using bond enthalpies the least accurate method of finding reaction enthalpies?

And I think the bond enthalpies are values under standard conditions, which might not always be the case.
Thu Jan 18, 2018 8:24 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Work Equation
Replies: 4
Views: 320

### Re: Work Equation

If you are putting work into the system (say pressing a piston into a cylinder containing a gas at a given pressure), the volume is becoming smaller, so ΔV is negative. The negative of the pressure times a negative ΔV is a positive value, which matches with the sign convention for putting work in.
Sat Jan 13, 2018 12:22 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Bonds Formed Exothermic
Replies: 2
Views: 122

### Re: Bonds Formed Exothermic

energy is released when bonds are formed because as the two or more atoms become one the total entropy of the system is reduced and also as the atoms come together the electron of one atom is attracted to the nucleus of the other atom and this results in a release of energy and a molecule which has ...
Thu Jan 11, 2018 9:49 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity: molar versus specific
Replies: 3
Views: 2097

### Re: Heat Capacity: molar versus specific

specific heat capacity is the amount of heat needed to raise the temperature of 1 gram of a substance by 1 K, whereas molar heat is the amount of heat needed to raise the temperature of 1 mole of a substance by 1 k.
Thu Jan 11, 2018 9:27 am
Forum: Phase Changes & Related Calculations
Topic: General Question
Replies: 3
Views: 233

### Re: General Question

q is the amount of heat transferred to a system, whereass H is a measure of the potential energy in the system