CHEMISTRY COMMUNITY

Lorena_Morales_1K

Yes you still do take it into consideration for the exponents.

Lorena_Morales_1K

Danielle DIS2L wrote:H! these are my previous notes from a step up session about them! I hope that you find them helpful :)

thank you so much for sharing these notes! they're super helpful

Lorena_Morales_1K

what exactly is the ideal gas law?

Lorena_Morales_1K

Hi! We add them together (reactants + products) for bond enthalpies. We break the bonds in the reactants which is an endothermic process. Since it's endothermic, energy needs to be put into the system (makes it positive). In terms of the products, we form new bonds, so energy is released - an exoth...

Lorena_Morales_1K

A reversible process is one in which both the system and its environment can return to exactly the states they were in by following the reverse path. An irreversible process is one in which the system and its environment cannot return together to exactly the states that they were in.

Lorena_Morales_1K

Heat capacity is the amount of heat energy required to raise the temperature of a body a specified amount. In SI units, heat capacity (symbol: C) is the amount of heat in joules required to raise the temperature 1 Kelvin.

Lorena_Morales_1K

No such thing as a dumb question :) Enthalpy is the amount of internal energy contained in a compound whereas entropy is the amount of intrinsic disorder within the compound. Enthalpy is zero for elemental compounds such hydrogen gas and oxygen gas; therefore, enthalpy is nonzero for water (regardle...

Lorena_Morales_1K

Vapour is a mixture of two or more different phases at room temperature, these phases are liquid and gaseous phase. Gas usually contains a single thermodynamic state at room temperature. Vapour has a definite shape of the gaseous particles when observed under a microscope.

Lorena_Morales_1K

A state property is a quantity that is independent of how the substance was prepared. Examples of state properties are altitude, pressure, volume, temperature and internal energy.

Lorena_Morales_1K

I am actually very confused on this concept as well

Lorena_Morales_1K

meet fresh boba! a little bit on the pricey side but their boba is pretty bomb :)

Lorena_Morales_1K

How about the chemical workers… are they unionized?

Lorena_Morales_1K

Don't trust atoms, they make up everything.

Lorena_Morales_1K

changing the temperature and/or the activation energy changes the rate constant

Lorena_Morales_1K

The relationship between temperature and the reaction rate is proportional; if you increase the temperature, you increase the reaction rate

Lorena_Morales_1K

Electricity is the flow of electrons within a given system. It can be quantified using charge, current, and potential. Charge is a physical property of matter. Charge causes matter to experience force within a given electromagnetic field. Current is defined as the amount of charge that passes in a ...

Lorena_Morales_1K

what exactly is the standard reduction potential? in simple terms :)

Lorena_Morales_1K

A coulomb is the SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere.

Lorena_Morales_1K

some fun facts about electrochemistry :)
https://kids.kiddle.co/Electrochemistry

Lorena_Morales_1K

What does a unique reaction rate mean again?

Lorena_Morales_1K

Does anyone know when the course Disability Studies 101W will be offered? I dont think it was offered for this spring 2021

Lorena_Morales_1K

What exactly is the order of the chem series classes? Like what comes after Chem 14A and Chem 14B?

Lorena_Morales_1K

I believe the 5e- is for trying to cancel out both sides of the reaction.

Lorena_Morales_1K

I thought the anode and cathode weren't necessarily things we move but rather distinct areas of the circuit that indicate electron flow? Can someone clarify this please? Thank you!

Lorena_Morales_1K

Would voltage difference be something we have to calculate on the final?

Lorena_Morales_1K

I think Lavelle covered it but I dont exactly remember. What exactly is the oxidation number and when is it altered?
Thank you in advance for your help!

Lorena_Morales_1K

This is so fascinating, I am not much of a cook myself but I definitely want to start to cook and make connections to the chemistry we're learning because it sounds super dope.

Lorena_Morales_1K

This is truly so informative and inspiring, thank you so much for your advice

Lorena_Morales_1K

how many types of entropy are there? & what exactly is positional (residual) entropy?

Lorena_Morales_1K

I believe he explained this in lecture but can someone explain why entropy is a maximum at equilibrium?

Lorena_Morales_1K

What exactly does it mean when work is positive? Thank you in advance for your help :)

Lorena_Morales_1K

After watching the lecture from 01/27/21, I was left confused on what is mean by doing work on the system/ let the system do work on the surroundings and how that affects the energy that is in the system. I feel that this concept is very important and I want to make sure I understand it. Hope someo...

Lorena_Morales_1K

Why is bond formation exothermic again?

Lorena_Morales_1K

It has already been answered but I agree :) it is because the volume is changing as well. We are only dealing with gases when it comes to volume decompression

Lorena_Morales_1K

I think that in a reversible process, every intermediate state between the extremes is an equilibrium state, regardless of the direction of the change. In contrast, an irreversible process is one in which the intermediate states are not equilibrium states, so change occurs spontaneously in only one ...

Lorena_Morales_1K

What exactly does Lavelle mean when he said "more work is being done on the system"?
Thank you!

Lorena_Morales_1K

what exactly is autoprotolysis?

Lorena_Morales_1K

whats the connection between enthalpy and Hess's law?

Lorena_Morales_1K

can someone explain the significance of phase changes?

Lorena_Morales_1K

which equations work on closed systems?

Lorena_Morales_1K

what is the difference between open and closed systems?

Lorena_Morales_1K

I think the smaller the pKa, the stronger the acid.

Lorena_Morales_1K

P=Pressure V=Volume n= #moles
R= gas constant
T= temp

Lorena_Morales_1K

Does anyone have any mnemonics to remember the Q and K relationship better? Hi, Here is a really nice one I learned in one of the workshop sessions: When you write it in terms of K first, then the sign points to the direction the reaction proceeds - if K>Q, reaction proceeds towards the products/fa...

Lorena_Morales_1K

Some that I feel are easy to remember are that when you add more reactants, equilibrium will shift right (reactants will decrease while products increase); when you add more products, equilibrium will shift left (products will decrease while reactants increase); when you remove reactants, equilibri...

Lorena_Morales_1K

Daria Obukhova 2B wrote:The only thing that should cause a change in K value is temperature.

Do you know the more specific definition of why temperature is the only thing that causes a change in K value?

Lorena_Morales_1K

What exactly is the complete definition of the R value?

Lorena_Morales_1K

How would you differentiate polar and nonpolar molecules? Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each ...

Lorena_Morales_1K

Coordination numbers are the numbers of bonds ligands forms with the transitional metal. Basically, they are the number of ligands bonded to TM. If you are still confused I think you should rewatch the Monday lecture (specifically the coordination compound part), Dr. Lavelle goes into dept about co...

Lorena_Morales_1K

Hi!

Perhaps someone else has already asked this but I was wondering, what exactly is a chelating ligand? :(

Lorena_Morales_1K

Dear Dr. Lavelle, Thank you so much for always making the smile in the beginning of lecture,AND at the end of lecture. The simplicity of this is very dear to my heart. A smile goes a very long way, especially during these frightening times, so thank you so much. Warm Regards, Lorena Morales Sandoval

Lorena_Morales_1K

I love your story! super inspiring to see how different and unique every person's journey is, especially yours. thank you so much for sharing <3

Lorena_Morales_1K

Im not sure if anyone has had this problem but I bought the Sapling program a while ago and my access codes have not been mailed to me, and I have not been able to access the homework. Is anyone in a similar situation? If so, is there a sort of extension for the homework in this case? Also, to confi...

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