## Search found 30 matches

Thu Mar 14, 2019 4:41 pm
Forum: General Rate Laws
Topic: intermediate molecules
Replies: 3
Views: 200

### intermediate molecules

Why are intermediate molecules not included in the rate law? Thank you!
Thu Mar 14, 2019 4:35 pm
Forum: General Rate Laws
Topic: Slowest step
Replies: 1
Views: 103

### Slowest step

Why do we use the rate of the slowest step for the overall rate law of an equation?
Thu Mar 14, 2019 4:34 pm
Forum: Second Order Reactions
Topic: Half life for second order reaction
Replies: 1
Views: 77

### Half life for second order reaction

What is the formula for half life for a second order reaction? Thank you
Fri Mar 08, 2019 12:17 am
Forum: Second Order Reactions
Topic: graph
Replies: 2
Views: 153

### graph

if you are looking at a graph, how can you tell if it is a first or second order reaction?
Fri Mar 08, 2019 12:15 am
Forum: Zero Order Reactions
Topic: initial concentration
Replies: 6
Views: 269

### initial concentration

Why do zero order reactions not depend on the initial concentrations?
Fri Mar 08, 2019 12:10 am
Forum: Method of Initial Rates (To Determine n and k)
Topic: reaction orders
Replies: 2
Views: 103

### reaction orders

What do reaction orders represent?
Thu Feb 28, 2019 7:20 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: delta G
Replies: 1
Views: 72

### delta G

what is the difference between delta G and delta Gr?
Thu Feb 28, 2019 7:13 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Organization of cell diagrams
Replies: 9
Views: 225

### Organization of cell diagrams

Do you need to put Pt(s) if there is a gas and aqueous molecule in a cell diagram?
Thu Feb 28, 2019 7:11 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: stoichiometric coefficients
Replies: 2
Views: 80

### stoichiometric coefficients

Do stoichiometric coefficients affect the cell potential?
Thu Feb 21, 2019 12:07 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: salt bridge
Replies: 4
Views: 214

### salt bridge

How does the salt bridge allow ion transfer?
Thu Feb 21, 2019 12:05 pm
Forum: Van't Hoff Equation
Topic: Van't Hoff use
Replies: 13
Views: 1001

### Van't Hoff use

in what situation would we use the Van't Hoff equation?
Thu Feb 21, 2019 12:03 pm
Forum: Balancing Redox Reactions
Topic: balance equations
Replies: 2
Views: 167

### balance equations

Can someone please explain the general steps to balancing an equation with the charges?
Tue Feb 19, 2019 11:14 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: S value
Replies: 3
Views: 392

### S value

why do more complex molecules have higher S values? Thank you
Tue Feb 19, 2019 11:10 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Delta H
Replies: 5
Views: 223

### Delta H

why does delta H positive not favor the forward process?
Tue Feb 19, 2019 11:06 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 5/2R vs 3/2R
Replies: 5
Views: 3035

### 5/2R vs 3/2R

how do we know when to use 5/2R versus 3/2R?
Thu Feb 07, 2019 12:06 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Degeneracy
Replies: 4
Views: 208

### Degeneracy

In degeneracy, when W=X^N, what does the x represent and how do we figure it out?
Thu Feb 07, 2019 12:04 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: delta u
Replies: 2
Views: 118

### delta u

When there is constant temperature, is delta u always 0? Thank you
Thu Feb 07, 2019 12:03 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: constant volume
Replies: 3
Views: 101

### constant volume

Is there always no work done when volume is constant?
Thu Jan 31, 2019 12:56 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard Enthalpy
Replies: 4
Views: 199

### Standard Enthalpy

Can someone explain why standard enthalpy od O2 is zero? Thank you
Thu Jan 31, 2019 12:54 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Reversible reactions
Replies: 1
Views: 60

### Reversible reactions

How does systems at equilibrium relate to reversible and irreversible reactions?
Thu Jan 31, 2019 12:51 pm
Forum: Phase Changes & Related Calculations
Topic: finding heat
Replies: 3
Views: 172

### finding heat

How do we know when to use latent heat and specific heat? Thank you!
Fri Jan 25, 2019 12:01 am
Forum: Phase Changes & Related Calculations
Topic: Irreversible and Reversible process
Replies: 2
Views: 92

### Irreversible and Reversible process

Can someone further explain what the difference between reversible and irreversible process is? Thank you
Thu Jan 24, 2019 11:44 pm
Forum: Phase Changes & Related Calculations
Topic: State functions
Replies: 4
Views: 303

### State functions

Can someone explain why heat is not a state function? Is it not interchangeable with temperature? Thank you
Thu Jan 24, 2019 11:37 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Delta H
Replies: 4
Views: 140

### Delta H

When Delta H is positive, does it mean the reaction is endothermic or exothermic? Thank you
Fri Jan 18, 2019 12:52 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: pressure
Replies: 2
Views: 140

### pressure

Why does increasing pressure by adding an inert gas not affect the concentration? Thank you
Fri Jan 18, 2019 12:38 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Polyprotic Acids
Replies: 1
Views: 93

### Polyprotic Acids

Do we always disregard the second equation of polyprotic acids when calculating concentrations?
Wed Jan 16, 2019 9:12 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE table
Replies: 2
Views: 94

### ICE table

How do we know when we should find concentrations by using an ICE table or by using the number of moles?
Wed Jan 09, 2019 9:21 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium table
Replies: 1
Views: 45

### Equilibrium table

How can we tell if x will be less than 5% of the initial value and we can use the shortcut for finding x in the equilibrium table? Thank you
Tue Jan 08, 2019 11:35 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Finding Q
Replies: 1
Views: 122

### Finding Q

How do we find the expression for Q?
Tue Jan 08, 2019 11:18 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Exothermic Reactions
Replies: 9
Views: 356

### Exothermic Reactions

How do I find out if a reaction is exothermic or endothermic? Thank you!