CHEMISTRY COMMUNITY

MadelineHlobik

We decide to use platinum if there is not already a metal on one side of the diagram.

MadelineHlobik

You only do it for solids, as solids cannot physically be mixed together.

MadelineHlobik

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.

MadelineHlobik

How can I tell the difference between a catalyst and an intermediate?

MadelineHlobik

How exactly do we calculate half life?

MadelineHlobik

It will be cumulative my TA said, will have 8 questions, and will predominantly focus on thermo/test 2/kinetics.

MadelineHlobik

Another Quick Question: how do we determine the first order reaction/how is it correlated with y=mx+C

MadelineHlobik

What sort of energy/cell potential does Nernst equation tell us?

MadelineHlobik

We add in Pt on the ends of a cell diagram when there are no solid metals on either side of the cell diagrams.

MadelineHlobik

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.

MadelineHlobik

Delta G is a state function, as it is made up of other state functions since as enthalpy and entropy

MadelineHlobik

So just to clarify, does a galvanic cell involve the cathode and anode?

MadelineHlobik

To confirm, do we find the Delta H and Delta S by using standard reaction formula (Sum of Products) — (Sum of Reactants)?

MadelineHlobik

Do spontaneous reactions have to occur quickly? Or do they just happen randomly?

MadelineHlobik

Delta G=Delta H— T * Delta S

MadelineHlobik

Is (3/2 R) the same as Cn when you are trying the change in entropy when there is a temperature difference?

MadelineHlobik

How do you calculate Gibbs free energy?

MadelineHlobik

To find the change in work when there is an isothermal change, use -nRTV2/V1.

MadelineHlobik

In an isolated system, no energy or matter leave the system right? However in a closed system energy can leave the system?

MadelineHlobik

Are the homework problems a good indicator of what the midterm will be like?

MadelineHlobik

When Q=K the reaction is at equilibrium, regardless of what those Q and K values are.

MadelineHlobik

No I don't think so, it just helps you to see where lone pairs are going in a reaction

MadelineHlobik

Should work always be found in J or kJ? Or does it matter?

MadelineHlobik

How exactly do you solve for delta H?

MadelineHlobik

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...

MadelineHlobik

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).

MadelineHlobik

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?

MadelineHlobik

When finding Kp, do you have to use a specific unit of pressure? Or can you use any?

MadelineHlobik

Does Kw=Ka*Kb and Kw=[H3O][OH]

MadelineHlobik

Correct, you can only calculate K when you have the molar equilibrium constants. If you just have the initial molarities, you can find Q.

MadelineHlobik

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?

MadelineHlobik

A strong acid will completely deprotonate in water, whereas a strong base will completely protonate in water

MadelineHlobik

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

CHEMISTRY COMMUNITY

Search found 33 matches

Re: Cell Diagrams (Using Platinum)

Re: vertical line in cell diagram

Re: Reducing/Oxidizing Power

Re: catalyst vs intermediate

Re: Half Life and k

Re: Final

Re: General “order” question

Re: Nernst

Re: Cell Diagrams (Using Platinum)

Re: Cell Potential Spontaneity

Re: Delta G a state function?

Re: Galvanic Cells

Re: Gibbs Free Energy Measurement

Re: gibbs free energy

Re: Gibbs Free Energy Measurement

Re: 3/2R vs 5/2R

Re: gibbs free energy

Re: Isothermal and Free Expansion

Re: Isolated System

Re: Midterm [ENDORSED]

Re: K = 1

Re: Bond Enthalpies and Lewis Structures

Re: Units

Re: delta H vs q

Re: State property

Re: Bond Enthalpies of Diatomic Molecules?

Re: Phase changes

Re: Pressure Notation

Re: The Conjugate Seesaw

Re: Week 1 Lecture 3

Q VS. K

Re: Strong vs Weak Acids and Bases

Calculating the Equilibrium Constant by Approximation