Search found 30 matches

by Jonny Schindler 1A
Fri Mar 15, 2019 2:05 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Reaction Mechanisms
Replies: 2
Views: 68

Re: Reaction Mechanisms

If you know the spontaneity then you can possibly use the change in moles to assume the enthalpy. I don't think this would ever come up though
by Jonny Schindler 1A
Fri Mar 15, 2019 2:03 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Catalysts in Rate Law
Replies: 5
Views: 74

Re: Catalysts in Rate Law

So does an increased concentration of an aqueous catalyst increase the rate of the reaction?
by Jonny Schindler 1A
Fri Mar 15, 2019 2:00 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: K constants
Replies: 2
Views: 42

Re: K constants

I think relating big K to the forward and reverse reactions is the only way to connect them.
by Jonny Schindler 1A
Mon Mar 04, 2019 3:31 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Kinetics
Replies: 7
Views: 115

Re: Kinetics

if a reaction is thermodynamically favorable doesn't occur because of kinetics, it is a kinetics controlled reaction.
by Jonny Schindler 1A
Mon Mar 04, 2019 3:24 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Reaction order
Replies: 4
Views: 90

Reaction order

How do you get the overall order of a reaction?
by Jonny Schindler 1A
Mon Mar 04, 2019 3:20 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: the phases in a cell diagram
Replies: 4
Views: 94

Re: the phases in a cell diagram

Which order do we put the aqueous products in if there are multiple?
by Jonny Schindler 1A
Mon Mar 04, 2019 3:19 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: E cell spontaneity
Replies: 5
Views: 105

Re: E cell spontaneity

Is there a quick way to assume the sign of the Ecell?
by Jonny Schindler 1A
Mon Mar 04, 2019 3:18 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Order of Cell Diagrams
Replies: 13
Views: 212

Re: Order of Cell Diagrams

Does anyone know when to use a comma in the cell diagrams?
by Jonny Schindler 1A
Mon Mar 04, 2019 3:16 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: K
Replies: 5
Views: 85

Re: K

When delta G is zero the equation is at equilibrium so K=1.
by Jonny Schindler 1A
Mon Mar 04, 2019 3:15 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Delta G rules
Replies: 8
Views: 134

Re: Delta G rules

And a negative enthalpy change and positive entropy change increase the spontaneity.
by Jonny Schindler 1A
Mon Mar 04, 2019 3:14 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Melting of ice
Replies: 9
Views: 196

Re: Melting of ice

if you can assume the sign of the enthalpy and entropy you can sometimes use that to determine the sign of delta G.
by Jonny Schindler 1A
Tue Feb 26, 2019 4:45 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: Boltzmann Equation
Replies: 3
Views: 266

Re: Boltzmann Equation

I believe W is the number of molecules to the power of the number of micro states
by Jonny Schindler 1A
Tue Feb 26, 2019 4:44 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: Derivations
Replies: 3
Views: 238

Re: Derivations

Conceptually, how does a change in temperature effect the equilibrium concentrations?
by Jonny Schindler 1A
Tue Feb 26, 2019 4:43 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: 216

Re: S value

They have a greater number of micro-states, or W in the fundamental entropy equation
by Jonny Schindler 1A
Tue Feb 26, 2019 4:41 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: ln(k2/k1)=(-delta H/R)(1/T2 - 1/T1)
Replies: 3
Views: 220

Re: ln(k2/k1)=(-delta H/R)(1/T2 - 1/T1)

Can anyone provide an example of using this equation?
by Jonny Schindler 1A
Tue Feb 26, 2019 4:40 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Redox Reactions
Replies: 4
Views: 96

Re: Redox Reactions

Whichever substance's reduction has the highest potential.
by Jonny Schindler 1A
Tue Feb 26, 2019 4:38 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Delta S Fusion
Replies: 2
Views: 70

Re: Delta S Fusion

The standard entropy of fusion is the standard enthalpy of fusion over the melting point
by Jonny Schindler 1A
Tue Feb 26, 2019 4:37 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Calculating entropy
Replies: 4
Views: 72

Re: Calculating entropy

Once you do each, just add the two to get the total change in entropy
by Jonny Schindler 1A
Tue Feb 26, 2019 4:36 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Negative Temperature
Replies: 5
Views: 99

Re: Negative Temperature

A positive entropy will always make a reaction more favorable. The temperature can only change by how much.
by Jonny Schindler 1A
Tue Feb 26, 2019 4:34 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: delta S
Replies: 7
Views: 149

Re: delta S

When volume is constant, changes in pressure/temperature result in a change in entropy
by Jonny Schindler 1A
Mon Jan 28, 2019 11:15 am
Forum: Phase Changes & Related Calculations
Topic: Steam
Replies: 11
Views: 200

Re: Steam

Is this also true for the small amounts of steam that escape even before the boiling point is reached?
by Jonny Schindler 1A
Mon Jan 28, 2019 11:11 am
Forum: Phase Changes & Related Calculations
Topic: 3rd method
Replies: 1
Views: 37

3rd method

Will we always be given the standard state of each species when we are expected to use the enthalpy of formation to calculate the enthalpy change?
by Jonny Schindler 1A
Mon Jan 28, 2019 11:08 am
Forum: Phase Changes & Related Calculations
Topic: Different enthalpy calculation methods
Replies: 4
Views: 89

Re: Different enthalpy calculation methods

There will usually be one clear method to used based on the information provided by the problem. If Hess's method can be used, it is the most accurate method.
by Jonny Schindler 1A
Sun Jan 20, 2019 8:55 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: endo/exothermic rxns
Replies: 5
Views: 83

Re: endo/exothermic rxns

Can you tell if a reaction is endo/exo just by the number of products vs. reactants?
by Jonny Schindler 1A
Sun Jan 20, 2019 8:52 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Stoichiometric Coefficients
Replies: 4
Views: 77

Re: Stoichiometric Coefficients

You just have to add the coefficients to the values in the ice table and the rest is exactly the same
by Jonny Schindler 1A
Sun Jan 20, 2019 8:48 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Temperature's effect on Kc
Replies: 2
Views: 66

Re: Temperature's effect on Kc

Consider which side of the reaction equation has heat energy. If heat energy is a reactant, an increase would result in a shift towards the products and vice verse. Essentially treat energy as a part of the reaction and use le chatlier's.
by Jonny Schindler 1A
Thu Jan 10, 2019 11:43 am
Forum: Ideal Gases
Topic: use
Replies: 8
Views: 95

Re: use

Since we will be using the partial pressures of gasses to find the equilibrium constant of some reactions, we may be asked to calculate partial pressures from a total pressure. This only requires addition and subtraction because the partial pressures of gasses in a system will add up to the total pr...
by Jonny Schindler 1A
Thu Jan 10, 2019 11:39 am
Forum: Ideal Gases
Topic: Ideal vs Real Gas
Replies: 6
Views: 114

Re: Ideal vs Real Gas

The equation for the ideal gas law can be modified to correct for characteristics of a specific gas. It can incorporate the attraction between gas molecules as well as the volume of the gas molecules.
by Jonny Schindler 1A
Thu Jan 10, 2019 11:29 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Reaction Quotient
Replies: 5
Views: 104

Re: Reaction Quotient

Both K and Q represent the ratio of products to reactants, but using Q implies that the reaction is not at equilibrium and the ratio will shift until equilibrium is reached. At this point, the ratio is represented as K

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