Question

What

Answer 1

Judging by the lack of information on phases given, I assume you need to understand a property of phase change. While phase is changing, temperature is not changing. I'm guessing the graph gives all three phases like this. Going off of that, what section of the graph is the solid phase?

Answer 2

600-1000 looks like it to me

Answer 3

That's a phase change part of the graph because temperature is not rising as we add more heat

Answer 4

oh ok, I am not completely sure which would be the solid phase then....

Answer 5

200-400?

Answer 6

While the line is sloping diagonally it is in a phase. While it is horizontal it is changing phase. Look at the diagonal parts.

Answer 7

oh, 1000-1200

Answer 8

There are three sets of diagonal lines, and that is the rightmost one so it's probably the gas phase

Answer 9

Solid is the coldest phase, where would that be?

Answer 10

oh ok! So how would i figure out the specific heat?

Answer 11

Do as the units tell you. This is why units are so important in physics. Specific heat is the amount of heat needed to raise the temperature by one degree Celsius per unit mass

Answer 12

im not quite sure, i had trouble with the lesson now i have homework could you help please?:-)

Answer 13

Unit mass is in grams, and this chart is given in terms of some substance of 20g. So divide the joules per degree by 20

Answer 14

First off you know which section is the solid phase right?

Answer 15

no :-(

Answer 16

What's the coldest part of the graph that is also diagonal?

Answer 17

0-200 added heat

Answer 18

Yes, you can see why that's solid right? After I explained the phase shift property to you

Answer 19

yes! thanks :-)

Answer 20

So during that phase what is the total change in joules?

Answer 21

4 J i got

Answer 22

since 200 divided by 20 is 4

Answer 23

Did you remember to check the change in degrees?

Answer 24

change in degrees is 50 from 0-200

Answer 25

How much did the temperature change during that heat added?

Answer 26

Yes so remember this is per degree. What do you do with that information?

Answer 27

divide it by 200 since that is change in heat added

Answer 28

Oh wait you divided wrong. 200 by 20 is 10

Answer 29

but 200 divided by 50 is 4

Answer 30

So you have 10 now. That means it takes 10 joules per gram to do that temperature change of 50 degrees. So how much per degree?

Answer 31

And yes you can do it that way too. 200 divided by 50 is 4, then divided by the total grams

Answer 32

Math doesn't care what you divide by first

Answer 33

so now I would divide 4 by what??

Answer 34

Total grams

Answer 35

Look at the units. J/g*C

Answer 36

Divide joules by total grams and change in temperature. And there's your answer

Answer 37

so 200 divided by 4??! I m so lost with this last part ugh

Answer 38

:-/

Answer 39

One step at a time. I told you to divide by 20 and 50. Why did I tell you to divide by those?

Answer 40

because that is heat added divided by temperature

Answer 41

Yes that explains the 200/50. But why also divide by 20?

Answer 42

because that is the amount of grams

Answer 43

Yes, since specific heat is change in joules per gram per degree

Answer 44

Now do you understand?

Answer 45

yes

Answer 46

but i still do not know how to get the Final answer

Answer 47

Literally just that. Divide

Answer 48

i did and i got 2.5

Answer 49

200/50 is 4, 4/20 is .2

Answer 50

i was doing 20 divided by 50 sorry..... I get it now i was being stupid

Answer 51

thank you for all of your help and i am sure you wouldn't want to help me with another hah!! :-)

Answer 52

You just need to think about why you're doing what you're doing. It's not random, everything has a reason

Answer 53

true, thank you! Anyone willing to help me with another haha:-(

Answer 54

Once again I'll see if I can

Answer 55

ok , will post another. thanks!