Search found 33 matches

by MadelineHlobik
Fri Mar 15, 2019 9:46 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagrams (Using Platinum)
Replies: 10
Views: 144

Re: Cell Diagrams (Using Platinum)

We decide to use platinum if there is not already a metal on one side of the diagram.
by MadelineHlobik
Fri Mar 15, 2019 9:45 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: vertical line in cell diagram
Replies: 4
Views: 64

Re: vertical line in cell diagram

You only do it for solids, as solids cannot physically be mixed together.
by MadelineHlobik
Fri Mar 15, 2019 9:43 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Reducing/Oxidizing Power
Replies: 7
Views: 127

Re: Reducing/Oxidizing Power

The more positive a standard reduction potential, the better it is at being an oxidizing agent. The more negative a standard reduction potential, the better it is at being a reducing agent.
by MadelineHlobik
Thu Mar 14, 2019 11:13 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: catalyst vs intermediate
Replies: 9
Views: 116

Re: catalyst vs intermediate

How can I tell the difference between a catalyst and an intermediate?
by MadelineHlobik
Sat Mar 09, 2019 6:39 pm
Forum: Zero Order Reactions
Topic: Half Life and k
Replies: 11
Views: 287

Re: Half Life and k

How exactly do we calculate half life?
by MadelineHlobik
Sat Mar 09, 2019 6:38 pm
Forum: Second Order Reactions
Topic: Final
Replies: 30
Views: 467

Re: Final

It will be cumulative my TA said, will have 8 questions, and will predominantly focus on thermo/test 2/kinetics.
by MadelineHlobik
Sat Mar 09, 2019 6:36 pm
Forum: Zero Order Reactions
Topic: General “order” question
Replies: 6
Views: 247

Re: General “order” question

Another Quick Question: how do we determine the first order reaction/how is it correlated with y=mx+C
by MadelineHlobik
Sat Mar 02, 2019 3:26 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst
Replies: 4
Views: 70

Re: Nernst

What sort of energy/cell potential does Nernst equation tell us?
by MadelineHlobik
Sat Mar 02, 2019 3:26 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagrams (Using Platinum)
Replies: 10
Views: 144

Re: Cell Diagrams (Using Platinum)

We add in Pt on the ends of a cell diagram when there are no solid metals on either side of the cell diagrams.
by MadelineHlobik
Sat Mar 02, 2019 3:24 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Cell Potential Spontaneity
Replies: 7
Views: 125

Re: Cell Potential Spontaneity

To understand this, use the equation Delta G= -n f e. So, when e is positive, the equation will still be negative. Thus, Delta G will be negative and spontaneous.
by MadelineHlobik
Wed Feb 20, 2019 5:10 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Delta G a state function?
Replies: 23
Views: 282

Re: Delta G a state function?

Delta G is a state function, as it is made up of other state functions since as enthalpy and entropy
by MadelineHlobik
Wed Feb 20, 2019 5:08 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Galvanic Cells
Replies: 7
Views: 88

Re: Galvanic Cells

So just to clarify, does a galvanic cell involve the cathode and anode?
by MadelineHlobik
Tue Feb 19, 2019 10:21 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs Free Energy Measurement
Replies: 5
Views: 77

Re: Gibbs Free Energy Measurement

To confirm, do we find the Delta H and Delta S by using standard reaction formula (Sum of Products) — (Sum of Reactants)?
by MadelineHlobik
Tue Feb 19, 2019 10:17 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: gibbs free energy
Replies: 10
Views: 140

Re: gibbs free energy

Do spontaneous reactions have to occur quickly? Or do they just happen randomly?
by MadelineHlobik
Tue Feb 19, 2019 10:10 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs Free Energy Measurement
Replies: 5
Views: 77

Re: Gibbs Free Energy Measurement

Delta G=Delta H— T * Delta S
by MadelineHlobik
Thu Feb 14, 2019 9:26 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: 3/2R vs 5/2R
Replies: 8
Views: 162

Re: 3/2R vs 5/2R

Is (3/2 R) the same as Cn when you are trying the change in entropy when there is a temperature difference?
by MadelineHlobik
Thu Feb 14, 2019 9:25 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: gibbs free energy
Replies: 10
Views: 140

Re: gibbs free energy

How do you calculate Gibbs free energy?
by MadelineHlobik
Thu Feb 14, 2019 9:25 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Isothermal and Free Expansion
Replies: 2
Views: 52

Re: Isothermal and Free Expansion

To find the change in work when there is an isothermal change, use -nRTV2/V1.
by MadelineHlobik
Sat Feb 09, 2019 11:00 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Isolated System
Replies: 5
Views: 131

Re: Isolated System

In an isolated system, no energy or matter leave the system right? However in a closed system energy can leave the system?
by MadelineHlobik
Sat Feb 09, 2019 10:59 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Midterm [ENDORSED]
Replies: 48
Views: 1147

Re: Midterm [ENDORSED]

Are the homework problems a good indicator of what the midterm will be like?
by MadelineHlobik
Sat Feb 09, 2019 10:57 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K = 1
Replies: 2
Views: 57

Re: K = 1

When Q=K the reaction is at equilibrium, regardless of what those Q and K values are.
by MadelineHlobik
Sun Feb 03, 2019 9:46 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies and Lewis Structures
Replies: 2
Views: 37

Re: Bond Enthalpies and Lewis Structures

No I don't think so, it just helps you to see where lone pairs are going in a reaction
by MadelineHlobik
Sun Feb 03, 2019 9:42 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Units
Replies: 7
Views: 127

Re: Units

Should work always be found in J or kJ? Or does it matter?
by MadelineHlobik
Sun Feb 03, 2019 9:41 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: delta H vs q
Replies: 9
Views: 127

Re: delta H vs q

How exactly do you solve for delta H?
by MadelineHlobik
Sun Jan 27, 2019 3:07 pm
Forum: Phase Changes & Related Calculations
Topic: State property
Replies: 3
Views: 47

Re: State property

For state properties, its value is not dependent on the path taken to obtain state (such as altitude, heat, enthalpy). For example, people can hike different paths and start and end at the same altitude. This shows that altitude is a state function because it only depends on the initial and final st...
by MadelineHlobik
Sun Jan 27, 2019 2:57 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies of Diatomic Molecules?
Replies: 1
Views: 31

Re: Bond Enthalpies of Diatomic Molecules?

I believe it is less accurate to use averages from different molecules, because you use the average of multiple different molecules. Whereas in bond enthalpies for diatomic molecules, they are each measured for those specific molecules (not an average).
by MadelineHlobik
Sun Jan 27, 2019 2:53 pm
Forum: Phase Changes & Related Calculations
Topic: Phase changes
Replies: 14
Views: 155

Re: Phase changes

If a reaction gives off heat, it has a negative delta h right? And this process is exothermic so it will release heat and then the surroundings will warm?
by MadelineHlobik
Sun Jan 20, 2019 10:46 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Pressure Notation
Replies: 5
Views: 98

Re: Pressure Notation

When finding Kp, do you have to use a specific unit of pressure? Or can you use any?
by MadelineHlobik
Sun Jan 20, 2019 10:44 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: The Conjugate Seesaw
Replies: 13
Views: 192

Re: The Conjugate Seesaw

Does Kw=Ka*Kb and Kw=[H3O][OH]
by MadelineHlobik
Sun Jan 20, 2019 10:43 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Week 1 Lecture 3
Replies: 4
Views: 68

Re: Week 1 Lecture 3

Correct, you can only calculate K when you have the molar equilibrium constants. If you just have the initial molarities, you can find Q.
by MadelineHlobik
Sun Jan 20, 2019 10:41 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q VS. K
Replies: 13
Views: 325

Q VS. K

Do you calculate Q the same way you calculate K? And then, you just compare Q to K to determine if more reactants are produced or not?
by MadelineHlobik
Sun Jan 20, 2019 10:38 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Strong vs Weak Acids and Bases
Replies: 2
Views: 50

Re: Strong vs Weak Acids and Bases

A strong acid will completely deprotonate in water, whereas a strong base will completely protonate in water
by MadelineHlobik
Sun Jan 20, 2019 10:26 pm
Forum: Ideal Gases
Topic: Calculating the Equilibrium Constant by Approximation
Replies: 2
Views: 53

Calculating the Equilibrium Constant by Approximation

When I'm finding the partial pressures of gases in an equilibrium mixture, how do I combine the partial pressures using ICE tables?

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