Search found 32 matches

by Emma Ward 2C
Thu Mar 15, 2018 9:38 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: 15.101b
Replies: 3
Views: 124

Re: 15.101b

@ Kayla, i think it is because it is implied that H2O is a liquid and liquids and solids are not included in the equilibrium constant?? thats the only reasoning i can think of
by Emma Ward 2C
Tue Mar 13, 2018 4:56 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Frequency Factor
Replies: 1
Views: 103

Frequency Factor

What is frequency factor?
by Emma Ward 2C
Tue Mar 13, 2018 4:49 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Collision Theory
Replies: 1
Views: 75

Collision Theory

In the book, it covers collision theory as well as mean relative speed. Are we going to be asked about that? I don't specifically remember covering these in class
by Emma Ward 2C
Tue Mar 13, 2018 4:34 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalyst
Replies: 3
Views: 108

Re: Catalyst

Also, does the fact that a catalyst can be homogeneous or heterogeneous have an affect on delta G and/or activation energy?
by Emma Ward 2C
Tue Mar 13, 2018 4:31 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: steady-state
Replies: 1
Views: 84

steady-state

Can someone give me an example of a reactant in a steady-state? How do we determine if something is at a steady state?
by Emma Ward 2C
Tue Mar 13, 2018 4:25 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalyst
Replies: 3
Views: 108

Catalyst

Does a reaction with catalyst always have the same delta G as a reaction with out a catalyst? What about activation energy?
by Emma Ward 2C
Sun Mar 04, 2018 3:45 pm
Forum: General Rate Laws
Topic: Independent of the rate
Replies: 2
Views: 114

Independent of the rate

What determines an element of being independent of the rate?
by Emma Ward 2C
Sun Mar 04, 2018 2:59 pm
Forum: First Order Reactions
Topic: orders of a reaction
Replies: 3
Views: 118

orders of a reaction

By looking at a reaction, what are some tips on determining the order of a reaction?
by Emma Ward 2C
Sun Mar 04, 2018 2:00 pm
Forum: First Order Reactions
Topic: Integrated rate law for first order reaction
Replies: 3
Views: 156

Integrated rate law for first order reaction

We were given two different equations for the integrated rate law for first order reaction. In which circumstances do we use each of them?
by Emma Ward 2C
Sun Feb 25, 2018 5:11 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: What is Free Energy of Activation
Replies: 5
Views: 723

What is Free Energy of Activation

What is free energy of activation?
by Emma Ward 2C
Tue Feb 20, 2018 12:55 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Galvanic cells
Replies: 2
Views: 70

Galvanic cells

When solving for Ecell, if you reversed the anode reaction, does the sign of E(anode) also get reversed?
by Emma Ward 2C
Mon Feb 19, 2018 3:55 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: 14.21
Replies: 1
Views: 106

14.21

for part d, how do you determine which is equation is being reduced or oxidized, since they are both receiving electrons and their charges are being reduced?
by Emma Ward 2C
Mon Feb 19, 2018 3:00 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: 14.9
Replies: 1
Views: 104

14.9

Can someone show how for problem b, n=6??
by Emma Ward 2C
Sun Feb 18, 2018 5:18 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: electrolytic cells
Replies: 3
Views: 177

electrolytic cells

what is the point of electrolytic cells? What are they used for?
by Emma Ward 2C
Sun Feb 18, 2018 4:12 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: galvanic cells and voltaic cells
Replies: 2
Views: 88

galvanic cells and voltaic cells

Are galvanic cells the same thing as voltaic cells?
by Emma Ward 2C
Sun Feb 18, 2018 2:55 pm
Forum: Balancing Redox Reactions
Topic: Balancing Redox reactions
Replies: 3
Views: 128

Balancing Redox reactions

when balancing half reactions, should we always balance the oxygen first before hydrogen or can it be the other way around?
by Emma Ward 2C
Sun Feb 11, 2018 1:42 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 9.13
Replies: 3
Views: 125

9.13

the question states that "during the test of an internal combustion engine, 3.00 L of nitrogen gas at 18.5 degrees C was compressed suddenly (and irreversibly) to .500 L by driving in a piston. In the process, the temp of the gas increased to 28.1 degrees C. Assume ideal behavior and 1 mole of ...
by Emma Ward 2C
Sat Feb 10, 2018 5:29 pm
Forum: Balancing Redox Reactions
Topic: Oxidation vs. reduction
Replies: 8
Views: 197

Oxidation vs. reduction

How do you tell which equation is the being oxidized or reduced?
by Emma Ward 2C
Sat Feb 10, 2018 5:25 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Delta G
Replies: 4
Views: 137

Delta G

why is delta G =0 at equilibrium?
by Emma Ward 2C
Sat Feb 10, 2018 5:20 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Derivations of Equations
Replies: 5
Views: 181

Derivations of Equations

For the midterm, are we going to need to know how to derive the Gibb's free energy formula?
by Emma Ward 2C
Sat Feb 03, 2018 7:35 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Delta G [ENDORSED]
Replies: 4
Views: 87

Delta G [ENDORSED]

why is delta G always negative?
by Emma Ward 2C
Sat Feb 03, 2018 7:34 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Degeneracy vs Disorder
Replies: 4
Views: 162

Degeneracy vs Disorder

is degeneracy the same thing as disorder?
by Emma Ward 2C
Sat Feb 03, 2018 7:26 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Which value of R to use?
Replies: 3
Views: 122

Re: Which value of R to use?

The values of R are based of the units. It helps to write out all of the units while working on a problem so you keep track of everything.
by Emma Ward 2C
Sat Jan 27, 2018 1:49 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: constant pressure
Replies: 5
Views: 187

Re: constant pressure

as previously mentioned, it is important to note that the units for delta H are kj/mole. Therefore, when determining the enthalpy for a specific molecule or compound in a reaction, you need to take into account the stoichiometric coefficient to determine the enthalpy for that specific molecule or co...
by Emma Ward 2C
Sat Jan 27, 2018 1:44 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Reversible isothermal expansion
Replies: 4
Views: 101

Reversible isothermal expansion

Will we need to know how to derive the formula for reversible isothermal expansion for future tests?
by Emma Ward 2C
Sat Jan 27, 2018 1:36 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Spontaneous Reactions [ENDORSED]
Replies: 2
Views: 59

Spontaneous Reactions [ENDORSED]

Can someone explain to me how to determine if a reaction is spontaneous or not? Super confused
by Emma Ward 2C
Sat Jan 20, 2018 3:58 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Enthalpy
Replies: 3
Views: 109

Re: Enthalpy

Heat is the energy transferred from a system to its surroundings and enthalpy is the measurement of the amount of heat that was exchanged.
by Emma Ward 2C
Sat Jan 20, 2018 3:54 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Most Accurate Method [ENDORSED]
Replies: 3
Views: 116

Re: Most Accurate Method [ENDORSED]

They are all relatively accurate but the most accurate is the enthalpy of formation. With the bond enthalpies, the numbers are rounded but with enthalpy of formation, the numbers are based of the states of the molecules and are specific to the states.
by Emma Ward 2C
Sat Jan 20, 2018 3:51 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Finding change in enthalpy when given bond enthalpies
Replies: 3
Views: 122

Re: Finding change in enthalpy when given bond enthalpies

When given bond enthalpies, it helps to draw the lewis structures and to analyze the change in the structures. When given bond enthalpies, you take the sum of the bonds broken minus the sum of the bonds formed! Hope this helps!
by Emma Ward 2C
Fri Jan 12, 2018 3:48 pm
Forum: Phase Changes & Related Calculations
Topic: Boiling water vs. steam
Replies: 6
Views: 278

Re: Boiling water vs. steam

if you look at the heating curve of water, going from solid to liquid to vapor, you will see the increase in temperature along with the increase of heat being applied to the water. As the water goes from solid to liquid, the enthalpy does not change by a significant amount. As water completes a phas...
by Emma Ward 2C
Fri Jan 12, 2018 3:41 pm
Forum: Phase Changes & Related Calculations
Topic: Irreversible process vs reversible process
Replies: 4
Views: 153

Irreversible process vs reversible process

Can someone explain to me the difference between irreversible and reversible processes?? Really confused
by Emma Ward 2C
Fri Jan 12, 2018 3:35 pm
Forum: Phase Changes & Related Calculations
Topic: Standard Reaction Enthalpy
Replies: 8
Views: 270

Re: Standard Reaction Enthalpy

standard reaction enthalpy occurs within a reaction when the reactants that are in their standards states turn into products in their standard states. the standard enthalpy of formation is the standard reaction enthalpy PER MOLE of formula units for the formation of a substance from elements in thei...

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