Question

#1: Which of the following is the mathematical representation of Boyle's law?

A. P1V1 = V2/T2

B. V1/T1 = V2/T2

C. P1V1 = P2V2

D. P1/T1 = P2/T2

**my answer: C
is that right?

Answer 1

correct.

Answer 2

#2: At room temperature, which of the following is the most compressible?

A. one liter of mercury, a liquid

B. one liter of oxygen, a gas

C. one liter of iron, a solid

D. one liter of water, a liquid
**my answer: B

is that right?

Answer 3

ooh! yay :)

Answer 4

B. one liter of oxygen, a gas

Answer 5

I feel I should leave the Chemistry to the Chemistry experts :D
It looks like you're in good hands, @iheartfood ^.^

Answer 6

#3: You open a can of soda at room temperature and hear a hiss. Which of the following factors has changed inside the container?

A. pressure of gas

B. temperature of gas

C. type of gas

D. atmospheric pressure

**my answer: D

is that right? :)

Answer 7

@msumner i did! :) just wanted to make sure :) and @chmvijay yay :)

Answer 8

D. atmospheric pressure

Answer 9

alright @terenzreignz :) haha thanks :)

Answer 10

#4: Which of the following is the mathematical representation of Gay-Lussac's law?

A. P1V1 = V2/T2

B. V1/T1 = V2/T2

C. P1V1 = P2V2

D. P1/T1 = P2/T2

**my answer: D

is that right?

Answer 11

#5: A student reduces the temperature of a 300 cm3 balloon from 60°C to 30°C. What will the new volume of the balloon be? (Remember to be careful with the units.)

A. 300 cm3

B. 273 cm3

C. 150 cm3

D. 600 cm3

***urmm not quite sure.. :/ do y'all get this?

Answer 12

#4 is correct

Answer 13

aweosme! :)

and what about #5 tho? :/

Answer 14

Well, it's Charles' Law. Volume and temperature are directly proportional.
Be careful, though. Temperature must be in an absolute scale, that is, in Kelvins...
Convert first.

Answer 15

one of gas law u have to apply and solve gas law at constant pressure
what it is called

Answer 16

yeah, but i always never understand how to do it... like how do i convert and solve? :/

Answer 17

could u pls show me?

Answer 18

Converting from Celsius to Kelvin has to to be the simplest... (compared, for instance, to Celsius to Fahrenheit, or something)
To convert from Celsius to Kelvin, simply add 273.15

Answer 19

K=°C + 273

Answer 20

okay... so 60+273= 333?

and 30+273=303 ?

Answer 21

is that right?

what do i do now?

Answer 22

Well, apply the Law... Charles' Law
\[\huge \frac{V_1}{T_1}=\frac{V_2}{T_2}\]

Answer 23

idk how to plug it all in :( can u pls show me?

Answer 24

What was the volume and the temperature of the gas, initially?

Answer 25

umm temp was 60 degrees and 300cm^3 was the volume... right?

Answer 26

temperature... you will kindly express it in Kelvins :)

Answer 27

okay... wait what?? the temp in kelvins?

so 60 K ?

Answer 28

or does that make it 333 K?

Answer 29

More or less. Then those are your V1 and T1 respectively

Answer 30

okay... so we have this so far? or do i need to write down the units as well?

Answer 31

No need for now. Now you also have a new temperature, that's T2

Answer 32

do i cross multiply now?