CHEMISTRY COMMUNITY

Kayla Tchorz-Dis 1F

the hydrogen bonds are very difficult to break so therefore it has a high heat capacity because it reuqires a lot of energy to break these bonds

Kayla Tchorz-Dis 1F

yes it is

Kayla Tchorz-Dis 1F

water is at a higher temp when it is steam, so therefore it would cause a more severe burn

Kayla Tchorz-Dis 1F

K>1 means its spotaneous, essentially its the opposite of delta g.

Kayla Tchorz-Dis 1F

finding the oxidation of a molecule that isn't standard depends entirely upon the the oxidation number of the molecule with standard oxidation values, like O and H. they usually have to equal each other, so just make sure the charges cancel out. hope that makes sense

Kayla Tchorz-Dis 1F

the more negative the number, the higher reducing potential that element has. You would be given the values and just rank them from that.

Kayla Tchorz-Dis 1F

it is definitely correct and useable, so I'm not really sure why it would say don't use it. Maybe we won't be asked this question often.

Kayla Tchorz-Dis 1F

I think individually the orders are first, and together they form a second order reaction.

Kayla Tchorz-Dis 1F

The units of k are completely dependent on what order you are dealing with. Zero order is M/s, first order is in s^-1, and second order is L/mol●s

Kayla Tchorz-Dis 1F

you just need to pay attention to the coefficients, and since o2 is half, theres half as much made

Kayla Tchorz-Dis 1F

I think that since its moving forward creating products, is why its positive.

Kayla Tchorz-Dis 1F

I'm also a little confused on the concept of K. In our notes it says K is dependent on temperature and activation energy. So if it's dependent, how is it a constant?

Kayla Tchorz-Dis 1F

I was wondering if using a porous disk or a salt bridge made the reaction different, and what that difference is. Thank you!

Kayla Tchorz-Dis 1F

Salt bridges are used to transfer electrons that have already passed from the anode, to the cathode, back to the anode. This maintains equilibrium in the battery and allows it to not “die” as fast.

Kayla Tchorz-Dis 1F

Yes because since you are using both those specific methods, you have to add either OH or H+ to signify that.

Kayla Tchorz-Dis 1F

ΔSsys+Δsurroundings =Δtotal, so when ΔS total=0, you just move either ΔS sys or ΔSsurr to the other side, making one negative. It doesn't matter which one

Kayla Tchorz-Dis 1F

You use Cp when there is constant pressure and Cv when you are delaing with constant volume

Kayla Tchorz-Dis 1F

Can someone please explain to me the difference between what reversible and irreversible and how it’s improtnst to understanding a question! Thanks!

Kayla Tchorz-Dis 1F

the value of temperature plays a great deal into the spontaneity of the reaction. The sign of the delta H and the delta also influences the ultimate sign of delta G, so it is somewhat a case to case basis. Neither one over the other influences it more.

Kayla Tchorz-Dis 1F

these are all correct, but the way that I find it easiest to remember it is basically the different ways we can arrange particles

Kayla Tchorz-Dis 1F

The universe is isolated because we consider it to be everything in existence, therefore it cannot lose energy or matter to anything else.

Kayla Tchorz-Dis 1F

The stronger the bonds, the more energy it takes to require to break the bonds, therefore having a higher bond enthalpy.

Kayla Tchorz-Dis 1F

The way I like to think of it is that you want to use the specific heat of the phase that it is changing into, as long as you're temperature threshold does not cross between two phases. This would do this if the problem would have started with -1 degree celsius. Hope that helps!

Kayla Tchorz-Dis 1F

Since you add 273 to both values, it would not interfere with the delta T value.

Kayla Tchorz-Dis 1F

For this, I'm also confused how you are supposed to combine the use of bond enthapies and also the enthalpy of formations.

Kayla Tchorz-Dis 1F

I'm confused how delta U is related to delta H, also if this will be on the upcoming test. Thanks!

Kayla Tchorz-Dis 1F

I'm confused on what I need to know, relevently, about the difference between work and heat. I know that heat is the energy associated with the random motion of particles, and work is energy of ordered motion in one direction, but I'm still confused as to what that really means. Thanks in advance!

Kayla Tchorz-Dis 1F

Can someone explain to me the importance and function of a calorimeter? Is this something that will be a big topic in our upcoming problems?

Kayla Tchorz-Dis 1F

As stated before, state properties do not depend on the path taken, and therefore because they’re independent of this, we can add them together.

Kayla Tchorz-Dis 1F

How do you know which work equation to use?

CHEMISTRY COMMUNITY

Search found 30 matches

Re: Heat Capacity of Water

Re: Is enthalpy a state function?

Re: Steam

Re: Test #2

Re: Oxidation Number

Re: Ranking elements

Re: Half-life of Second-Order

Re: Naming Orders

Re: k

Re: Rate of Reaction

Re: Reaction Rates [ENDORSED]

Re: rate constants

Salt Bridge Versus Pourous Disk

Re: Salt Bridges

Re: Cell diagram acidic/basic

Re: Delta S total [ENDORSED]

Re: Cp v. Cv!

Reversible

Re: enthalpy and entropy when it comes to spontaneous reactions

Re: Degeneracy

Re: The universe

Re: Bond Enthalpies

Re: Question regarding 8.39 homework question

Re: Question 8.31

Re: 8.67

delta U and delta h

Heat versus work

Calorimeter

Re: Why can state properties be added?

Work (in general) [ENDORSED]