Another Chemistry question...

Question

anonymous · Answer

attachment

anonymous · Answer

When the substance in the diagram is heated to "T 2 ," what has happened? Select all that apply.

espex · Answer

Okay, so looking at the diagram, which of the suggestions can you apply to it?

anonymous · Answer

I put A and C

anonymous · Answer

I think that is what it is, but am unsure

espex · Answer

The kinetic energy average, the line that marks the peak, has it increased in position or decreased?
Has the peak increased or decreased?
Are there more molecules or less at a high energy level?

anonymous · Answer

It has decreased

anonymous · Answer

The temperature has decreased

espex · Answer

They are telling you that T2 is greater than T1, so the temperature has increased.. Also, look at the line that denotes the average, where has its position moved to along the x-axis?

anonymous · Answer

It is higher?

espex · Answer

Yes, so if the average kinetic energy is higher, 'A' cannot be a correct answer.

anonymous · Answer

Haha that makes sense

espex · Answer

Okay, so that takes care of the first two, now look at the last two because they are both concerning molecules energy level.

espex · Answer

Does the bell shape cover a larger portion of the x-axis (kinetic energy) in temp one or temp two?

anonymous · Answer

I am sorry but I am not getting it.

anonymous · Answer

temp 2

espex · Answer

Right, and since the bell encompasses the amount of molecules, would you say there are more or less in temp 2?

anonymous · Answer

less

espex · Answer

Well it is larger, so it should have more molecules under its shape.

anonymous · Answer

I don't get it.

espex · Answer

Okay, let's back track.
The y-axis has to do with the number of molecules, and the x-axis has the amount of energy. Do you see that?

anonymous · Answer

Yes

espex · Answer

Okay, so looking at the last two options (Fewer or more molecules have a higher energy level)
Everything under those two curves are # of molecules, so the purple curve houses more or less molecules than the red curve?

anonymous · Answer

Less

espex · Answer

Remember that the energy level is along the x-axis.

espex · Answer

Notice that they both start in the same point, and which goes farther?

espex · Answer

Also, when you heat up water, what do you see from the water molecules?

anonymous · Answer

T1 I think

espex · Answer

Do water molecules speed up or slow down when you increase the temperature?

anonymous · Answer

speed up

espex · Answer

Right, can you think of why?

anonymous · Answer

Because of the heat and kinetic energy

espex · Answer

Right, because you are giving them energy, you are putting more energy into the system by heating it. So in your problem here, T1<T2, this means that you are putting heat (energy) into the system, so what can you expect will happen to the molecules?

anonymous · Answer

It will increase

espex · Answer

YES!

espex · Answer

So if you give the system more energy then would you expect that more or less molecules will have that high energy?

anonymous · Answer

more

espex · Answer

Right!

espex · Answer

Okay, that takes care of four out of the five options.

espex · Answer

Now the last one asks if you think the highest energy level has decreased.

anonymous · Answer

So I should have "e, c, b"

espex · Answer

If you are picking C, does that mean the highest energy level has decreased? You have concluded previously that the average energy level increased, you also concluded that more molecules have high energy.

espex · Answer

Look at the right side of each curve, is T2 farther right or is T1?

anonymous · Answer

Oh no

espex · Answer

I think you got it. :)

anonymous · Answer

Haha, yeah I got it lol  finally... do have time to help me with balancing... I have two questions.

anonymous · Answer

Here is one of the questions...

espex · Answer

I think you have a better handle than you believe but yes, I have a few moments.

anonymous · Answer

This one confuses me and I am having a hard time starting somewhere.

espex · Answer

Well look at the Cl in your first position on the left and last position on the right.
You can see that you will need to add 3 on the right to get them even. This will also add 3 H on the right giving you a starting position of 2 on the left and 6 on the right.

anonymous · Answer

Here why don't you login... http://join.me 774-413-257#

anonymous · Answer

Thanks.

anonymous · Answer

average kinetic energy increased