CHEMISTRY COMMUNITY

Rosa Munoz 2E

Use the pre equilibrium approach

Rosa Munoz 2E

Allows you to find K at different tempratures

Rosa Munoz 2E

Email your ta

Rosa Munoz 2E

Jared Khoo 1G wrote:Will the final still account for the 180 points on the syllabus or will it be worth less?

It will be worth the same.

Rosa Munoz 2E

Honestly, due to the circumstances the test might not look like something we are used to (MAYBE IN A GOOD WAY)

Rosa Munoz 2E

No idea. We're all waiting on Lavelle's email

Rosa Munoz 2E

One with lower concentration will be oxidized

Rosa Munoz 2E

Congrats!!

Rosa Munoz 2E

Activation energy plays a role in both.

Rosa Munoz 2E

Catalysts lower the activation energy

Rosa Munoz 2E

Frequency of collisions

Rosa Munoz 2E

The one being oxidized is the reducing agent because it causes the other to become reduced and vice versa

Rosa Munoz 2E

Rosa Munoz 2E

Yes, you balance O using H2o and H by using H^+

Rosa Munoz 2E

Depends what type of solution you it is occurring in.

Rosa Munoz 2E

Oxidation occurs at the anode and reduction at the cathode. You can also look at the standard potentials to determine which one will be which. Galvanic cells only work with positive standard cell potentials.

Rosa Munoz 2E

Does anyone know what Lavelle's office hours are like? Is it going over general HW problems and information, or do we need to ask him questions and bring our own HW problems in? It's similar to the TA office hours where you are able to ask questions. When I went it was mostly questions regarding th...

Rosa Munoz 2E

Does Dr. Lavelle announce anywhere when he cancels office hours?

Rosa Munoz 2E

In the syllabus it says it is not curved but he usually does.

Rosa Munoz 2E

Don't be so hard on yourself :/ I went through the same thing last quarter. His 14 A midterm gave me super bad test anxiety- I thought I was going to fail. Buttttt now I don't feel like that :) just reach out for help.

Rosa Munoz 2E

Up to you but prob prioritize finish the series first then the labs.

Rosa Munoz 2E

I am having trouble as well.

Rosa Munoz 2E

No, it would have to be insulated

Rosa Munoz 2E

TV
PRESSURE
HUGS

Rosa Munoz 2E

Kelvin. it only doesn't matter if we are talking about change. If it is a capital T then it must be Kelvin

Rosa Munoz 2E

Rosa Munoz 2E

You do need to memorize them

Rosa Munoz 2E

Ideal gases are elastic, have no intermolecular forces,

Rosa Munoz 2E

Look at the units to decide which one to use

Rosa Munoz 2E

Kc is concentration Kp is partial pressure.

Rosa Munoz 2E

Pressure Volume = moles R is a constant T temperature

Rosa Munoz 2E

Rosa Munoz 2E

the path taken matters for heat and work

Rosa Munoz 2E

When they refer to constant pressure, are we referring to constant external pressure?

Rosa Munoz 2E

Can someone explain the key differences

Rosa Munoz 2E

Because it uses averages.

Rosa Munoz 2E

He didn't mean that there was a more efficient way. The short cut works but it does not provide you with an accurate understanding as to why. For our tests you will not have to worry about understanding the actual reasoning. The shortcut will work just fine

Rosa Munoz 2E

During a phase change, temperature does not increase. The energy goes into breaking bonds.

Rosa Munoz 2E

Energy is required to break bonds so it is positive. When bonds are formed it is negative.

Rosa Munoz 2E

yes it would be exothermic

Rosa Munoz 2E

Water expands when it freezes. How much work does 100. g of water do when it freezes at and pushes back the metal wall of a pipe that exerts an opposing pressure of 1070 atm? The densities of water and ice at are 1.00 and 0.92 , respectively

Rosa Munoz 2E

if the ka is smaller than 10^3 than you may use the approximation but if percent dissociation is larger than 5% then you have to go back and use the quadratic equation

Rosa Munoz 2E

molar concentration deals with molarity

Rosa Munoz 2E

I am confused as well on why you can use the Kb value for NH3

Rosa Munoz 2E

Since it is equal to a constant, if one goes down, the other must go up.

Rosa Munoz 2E

Find the initial concentration of the weak acid or base in each of the following aqueous solutions: (a) a solution of HClO with pH 4.60; (b) a solution of hydrazine, NH2NH2, with pH 10.20. I looked at the solution manual and I am confused as to why (3.0x10^-8) appears twice (in the numerator and den...

Rosa Munoz 2E

Kc uses concentrations. Kp uses partial pressures. The answers will not always be the same.

Rosa Munoz 2E

The ideal gas law assumes: 1) no intermolecular forces, 2)no volume, 3)collisions are perfectly elastic (no kinetic energy is lost). These conditions are not realistic, thus why it is the "ideal" gas law.

Rosa Munoz 2E

The R is a constant, you can find it on the equation sheet. Just pay attention to which unit of pressure they are using.

Rosa Munoz 2E

Definitely chemical equilibrium+ whatever else we learn before the test. Ask your TA+Lavelle

Rosa Munoz 2E

Both are applicable

Rosa Munoz 2E

Hope there’s a curve!

Rosa Munoz 2E

Bronsted is the commonly used one.

Rosa Munoz 2E

Just know the basics of how to calculate ph.

Rosa Munoz 2E

He will go over some of the same things on Monday.

Rosa Munoz 2E

Strong acids will have complete deprotonation and strong bases will go through complete protonation.

Rosa Munoz 2E

Yeah! Where do you want me to send them to you?

Rosa Munoz 2E

Either is fine

Rosa Munoz 2E

Look at the central atoms independently to determine shape.

Rosa Munoz 2E

Rosa Munoz 2E

2 bonded pairs, 1 lone pair= bent. 2 bonded pairs, 2 lone pairs=bent.

Rosa Munoz 2E

VSEPR shapes, intermolecular forces+ how they relate to boiling point, sigma and pi bonds...

Rosa Munoz 2E

Everything after the midterm

Rosa Munoz 2E

Lone-Lone pair PR is greater than the rest.

Rosa Munoz 2E

There are helpful videos on Youtube!

Rosa Munoz 2E

Should we memorize some of the common values of electronegativity?

Rosa Munoz 2E

VSEPR (valence shell electron pair repulsion)

Rosa Munoz 2E

You don't have to know how to derive it.

Rosa Munoz 2E

Resonance structures should have the same overall charge.

Rosa Munoz 2E

A coordinate covalent bond is when an atom provides two electrons instead of one.

Rosa Munoz 2E

Depends on the certain element.

Rosa Munoz 2E

Make sure to know the trends.

Rosa Munoz 2E

The elements closer to the noble gases have higher ionization energy.

Rosa Munoz 2E

Watch YouTube videos and go through the homework problems.

Rosa Munoz 2E

Thanks!

Rosa Munoz 2E

Matt Sanruk 4F wrote:Any numerical value/constants will be given to us, correct?

The equation sheet we are given for the test is on the website.

Rosa Munoz 2E

Because they have a d orbital

Rosa Munoz 2E

Atoms are trying to have 8 electrons in their outer shell, giving it the same e- config as a noble gas.

Rosa Munoz 2E

If you go on the class website you can find the dates and times of the review sessions.

Rosa Munoz 2E

Yes, base your sig figs off of the given.

Rosa Munoz 2E

I don't think he will posting any further modules.

Rosa Munoz 2E

He does not post his slides.

Rosa Munoz 2E

You don't have to to use x,y,z.

Rosa Munoz 2E

I don't think he'll post the slides nor more videos.

Rosa Munoz 2E

Rosa Munoz 2E

What units belong to each variable in p=mv?

Rosa Munoz 2E

Hertz is the unit for frequency.

Rosa Munoz 2E

I usually use 3.0x10^8.

Rosa Munoz 2E

It would be helpful if he posted more modules.

Rosa Munoz 2E

Do whatever section we are covering in lecture. If he hasn't gone over it, don't do it.

Rosa Munoz 2E

You can go review your test during office hours.

Rosa Munoz 2E

Calculate the wavelength of a 275 kg single-seat electric car traveling at a speed of 125 km.hr-1. Do electric cars have wavelike properties?

Do we have to convert the speed to m*s^-1? If so, how do you do that?

Rosa Munoz 2E

n 1.0 s, a 60 W bulb emits 11 J of energy in the form of infrared radiation (heat) of wavelength 1850 nm. What is the energy per photon of light emitted?
How many photons of infrared radiation does the lamp generate in 1.0 s?

Can someone explain the second part

Rosa Munoz 2E

If you purchase the E-textbook, you get access to additional resources.

Rosa Munoz 2E

The formula can be used to find the energy of light of a given frequency.

Rosa Munoz 2E

Now I am confused... in the textbook R is positive.

Rosa Munoz 2E

Can anyone link me to helpful videos for the quantum section?

Rosa Munoz 2E

Should we be familiar with the Stefan-Boltzmann law?

Rosa Munoz 2E

You might have to go to office hours to view your test.

Rosa Munoz 2E

It is a constant.

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