CHEMISTRY COMMUNITY

KayleeMcCord1F

adding onto this, does the order of X/Y have any significance in determining if species X and Y are being oxidized or reduced?

KayleeMcCord1F

What K value were we supposed to get as the answer?

KayleeMcCord1F

What is the relationship between free energy and work?

KayleeMcCord1F

Do we have to know the van't Hoff equation for the final?

KayleeMcCord1F

I think the equation goes (Tf-Ti) so for the Copper side it should be (T-100), because both the water and Copper should have the same final temperature at equilibrium. This will yield the 24.8 degrees C.

KayleeMcCord1F

How do you know when a substance is in its standard state?

KayleeMcCord1F

Hey do you have any sodium bromide?
Na BrO

KayleeMcCord1F

I tell bad chemistry jokes because all the good ones Ar.

KayleeMcCord1F

In the ozone example about homogeneous catalysts in lecture today, which species is actually the catalyst?

KayleeMcCord1F

To be an intermediate, the species just needs to cancel out within the set of reaction steps given. Reaction coefficients are also important when checking to see if things cancel out!

KayleeMcCord1F

To determine the exponents we would need some experimental data.

KayleeMcCord1F

What's an example of a situation when an intermediate would be considered in the overall rate law?

KayleeMcCord1F

k can be changed by altering the temperature or activation energy.

KayleeMcCord1F

The overall reaction rate will be determined by the slowest step.

KayleeMcCord1F

A zero order reaction has a linear graph with a negative slope.

KayleeMcCord1F

Should we always start problems using the pre-equilibrium approach?

KayleeMcCord1F

You can determine molecularity by the number of molecules of reactants.

KayleeMcCord1F

I think the higher the energy barrier, the slower the step will be because the barrier is harder to overcome.

KayleeMcCord1F

Is there a maximum molecularity that we'll deal with in this class?

KayleeMcCord1F

Molecularity just has to do with the number of molecules coming together, rather than the type/identity of the molecules.

KayleeMcCord1F

I believe that the rates will be given along with the mechanism, and we can determine the slowest step from that.

KayleeMcCord1F

Will we be expected to be able to apply this concept on the test and/or final?

KayleeMcCord1F

Also, how should we know when to leave answers in terms of J vs. kJ?

KayleeMcCord1F

Is it necessary to memorize the oxidation numbers for some elements?

KayleeMcCord1F

How do you know which direction things move through the salt bridge?

KayleeMcCord1F

Specific heat capacity (grams) and molar heat capacity (mols) both depend on the amount of substance present, making them extensive properties.

KayleeMcCord1F

The enthalpy of a system is the total amount of heat present in it.

KayleeMcCord1F

An extensive property relies on the amount of matter present while an intensive property relies on the type of matter present.

KayleeMcCord1F

It may be helpful just to remember the two that are liquids (mercury and bromine) and that the noble gases plus F, N, O, and Cl are gases and the rest are solids.

KayleeMcCord1F

Temperature stays constant during a phase change because the heat energy is being used to change the state of the reactant instead of raising the temperature.

KayleeMcCord1F

I think steam burns more than liquid water because when steam hits the skin it undergoes a phase change (to liquid) which releases a ton of energy into the skin.

CHEMISTRY COMMUNITY

Search found 31 matches

Re: Creating Cell Diagrams

Re: Test 2 #3

Free energy and work

Re: Van't Hoff

Re: Homework Problem 8.21

Standard States

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

Catalyst Example from lecture 3/12

Re: Intermediates

Re: 15.51

Re: HW 15.49

Re: K

Re: slow reaction mechanisms

Re: 0 order

Re: Using pre-equilibrium approach

Re: molecularity

Re: Energy barrier

Re: What is Molecularity?

Re: Molecularity and Coefficients

Re: Rate-determining slowest step

Re: Pseudo-1st-Order

Re: Standard Conditions and Temperature

Re: Reduction and Oxidation

Re: cell diagram (hw14.11)

Re: Heat Capacity Properties

Re: Enthalpy

Re: Intensive vs. Extensive

Re: Standard States

Re: Temperature and Heat

Re: Steam burning more than water question