Question

A gas has a volume of 1.50 m3 at a temperature of 25.0°C. What volume will the gas occupy when it is cooled to 15.0°C?

A. 2.50 m3
B. 1.55 m3
C. 0.9 m3
D. 1.45 m3

Answer 1

Since we aren't given any info on pressure or number of moles changing, we can assume they are constant. So, the ideal gas law simplifies to \[\frac{ V _{1} }{ T _{1} }=\frac{ V _{2} }{ T _{2} }\] where the unit of V just must be consistent and T is in K.

Answer 2

Let me know what you get :-)

Answer 3

Ok, so it's C right?

Answer 4

@aaronq check please?

Answer 5

@JoannaBlackwelder

Answer 6

Hm, no, I don't get C. Did you convert your temps into K?

Answer 7

A? @JoannaBlackwelder

Answer 8

Can you show me what you did for your calcs?

Answer 9

I wrote it down... /: but i know that according to the equation ,it should be A right?

Answer 10

That's not what I get....

Answer 11

What did you make V1, T1, V2, and T2?

Answer 12

Oh wait no its B! lol i see where i made the mistake + not -

Answer 13

thanks :)

Answer 14

What do you mean + not -? And I also don't get B

Answer 15

My work was a bit messy and I made some numbers negative instead of positive lol and what do you mean it's not B?

Answer 16

I don't get B for the answer.

Answer 17

Gas expands when heated and contracts when cooled. Thus, \(\rm V_2<V_1\)