CHEMISTRY COMMUNITY

CalebBurns3L

It is the maximum amount of energy that can be used to do work.

CalebBurns3L

ICE tables will not be necessary this quarter.

CalebBurns3L

That is essentially the only difference with regards to balancing the half reactions.

CalebBurns3L

Comas for molecules of the same state, line for different state.

CalebBurns3L

Water is assumed because of the aqueous states.

CalebBurns3L

You're going to need to split up the reaction into its half reactions. And then you're going to balance it so the electrons cancel and use that final number of electrons as the n.

CalebBurns3L

You will be adding OH- if its under basic conditions and H+ under acidic conditions.

CalebBurns3L

You won't have OH- and H+ in the same reaction for these problems. For acidic you'll add H+ and for Basic you'll add OH-

CalebBurns3L

First solve for concentration, and then if it is second order than square the concentration, then to find k plug in values and solve.

CalebBurns3L

Do we need to know radical chain reactions for the final?

CalebBurns3L

Usually conversions will simply involve changing minutes into seconds or hours into seconds.

CalebBurns3L

At some point in the reaction mechanism, the catalyst would show up on the left side as well because it is important that the enzyme cancels when you add up the elementary steps.

CalebBurns3L

There's never going to be a question that directly asks "derive this equation." But it certainly could be helpful to know the derivations in order to solve problems and simply for the stake of understanding where the equations come from.

CalebBurns3L

rate is constant, which means that the graph would be a horizontal line until all the reactants are used up and the rate instantly drops to zero.

CalebBurns3L

Yes, you would simply calculate the half life and then multiple it by 2 get the time to reach 1/4 of the reactant remaining.

CalebBurns3L

The more negative the standard reduction potential for a particular compound, the stronger it will act as a reducing agent.

CalebBurns3L

Write out the half reactions, and balance them so that the electrons on each side would cancel. Then use the number of electrons that are being transferred as n.

CalebBurns3L

The the compounds are in a different state, then you always separate them with bars. Otherwise, if they are in the same state, you would simply separate them with commas.

CalebBurns3L

Delta S total is zero but delta S of the system is not necessarily equal to zero.

CalebBurns3L

Yes, since no energy or matter would be flowing in or out with all of those values set to 0.

CalebBurns3L

I am also confused about this. The way that we're supposed solve the problem suggests that after boiling, the water cools back down to room temperature. Wouldn't the water just condense again?

CalebBurns3L

Negative Delta G means spontaneous because energy is leaving the system.

CalebBurns3L

Both the entropy and enthalpy change during a phase change, so yes.

CalebBurns3L

Yes, state properties are additive!

CalebBurns3L

The values will always be provided, and it is always bonds broken - bonds formed.

CalebBurns3L

You can increase the internal energy of a closed system by adding heat to it or performing work on the system.

CalebBurns3L

Assuming that the universe contains everything in existence, then the universe would indeed be an isolated system because no energy or matter can leave the system of "everything in existence."

CalebBurns3L

You have to write out the units for each step of the reaction so you know what units your final answer should be in.

CalebBurns3L

Bond enthalpies represent averages, and do not accurately represent the enthalpies specific to a certain molecule.

CalebBurns3L

Super confused on this question. In the answer manual they multiply the first equation and its standard reaction enthalpy by 3/2 which makes sense to me. But in the next equation they ONLY multiple O2 by 3/2 so that the O2's cancel and I don't get how you're allowed to do that.

CalebBurns3L

I think the purpose of writing it as CH3COO- is to indicate that the molecule is a conjugate base to CH3COOH, it shows where the molecule came from.

CalebBurns3L

What does percentage deprotonation represent?

CalebBurns3L

Is the only difference between Pi and Sigma bonds that Pi bonds can rotate?

CalebBurns3L

90 degrees between atoms on the side and 180 between atoms if you're going over the lone pairs on the central atom.

CalebBurns3L

A combustion reaction always results in the production of CO2 and H20 in gaseous form.

CalebBurns3L

Wait so is a hybridized orbital basically the addition of two orbitals? So the hybridization of an s orbital and a p would have 8 orbitals? I'm a little confused on what's actually going on here.

CalebBurns3L

Can we tell how many valence electrons an atom has by looking at wavefunctions? Like is are valence electrons the ones that are contained in the outermost sub shell? Im confused how this all works.

CalebBurns3L

So is all that we really need to know that the orbital numbers are the answers to the Shrodinger Equation? Im a little confused how much we need to understand the equation, do we need how to solve things with it?

CalebBurns3L

I'm confused about how the l quantum number works. I understand that it determines shape in that l = 0 means s-orbital, l = 1 means p-orbital and so on. But if n>4 then can't l be greater than 3? What shape would an l number >3 have? Does it cycle through the shapes?

Thank you!

CalebBurns3L

Mass (kg), length (m), time (s)

CalebBurns3L

Yes, the speed of light can be considered a velocity, speed is simply the magnitude of velocity. However, that doesn't mean you can use it has the velocity component in De Broglie's equation. That equation is for particles with mass, not for light waves/photons.

CalebBurns3L

@Julian Krzysiak 3L No but so that's what's confusing me. I thought it should go exactly as you described, but in the solutions Manual it says that n=1 is initial and n= 3 is the final, which is the opposite of what you said :( and also opposite to what would make sense to me if the electrons are &q...

CalebBurns3L

Okay so I understand how to get that the two n's are n = 1 and n=3, but how are you supposed to know that it goes from n=1 to n=3 and not the other way around?

CalebBurns3L

Okay so I get that that a black body absorbs all of the frequencies of light, but what exactly is the application or relevance to the broader realm of quantum mechanics?

CalebBurns3L

Light is made up of both an electrical and a magnetic wave. The waves oscillate in a manner that is perpendicular to each other, so if the electrical field is moving forward than the magnetic field oscillates perpendicular to that direction. In chemistry we only really worry about the electrical wav...

CalebBurns3L

You are correct. If a subscript follows a group of elements isolated with parenthesis, then the subscript applies to every element in that group. To further clarify your question, the reason that some atoms are paired together in parenthesis is to denote the presence of a polyatomic ion and to show ...

CalebBurns3L

You are correct in assuming that they have infinite significant figures. They are exact values and therefore their precision is not relevant to the problem; only concern yourself with the sig figs from the pieces of data provided by the problem.

Search found 47 matches