anonymous
  • anonymous
what would be the pressure of a given mass of a gas, if its volume and temperature are doubled ............. ?
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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JoannaBlackwelder
  • JoannaBlackwelder
P1V1/T1=P2V2/T2 when mass is constant.
JoannaBlackwelder
  • JoannaBlackwelder
What happens when we sub in 2V1 for V2
JoannaBlackwelder
  • JoannaBlackwelder
And 2T1 for T2?

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anonymous
  • anonymous
He wants to complement the question one word
JoannaBlackwelder
  • JoannaBlackwelder
Ok, we are getting there.
anonymous
  • anonymous
so the answer : mass is constant.?
JoannaBlackwelder
  • JoannaBlackwelder
No, that is an assumption, since we aren't told how it will change.
JoannaBlackwelder
  • JoannaBlackwelder
Do you see how when the volume is doubled, that would be 2 times the original volume?
anonymous
  • anonymous
yes
JoannaBlackwelder
  • JoannaBlackwelder
Ok, cool. And the same for temp?
anonymous
  • anonymous
yup
JoannaBlackwelder
  • JoannaBlackwelder
Ok, so, can you plug those into the equation?
anonymous
  • anonymous
P1V1/T1=P2V2/T2
JoannaBlackwelder
  • JoannaBlackwelder
That is the original equation. Can you plug in the other expressions we came up with?
anonymous
  • anonymous
I don't understand sorry
JoannaBlackwelder
  • JoannaBlackwelder
It's cool. So, since V2 can be represented by 2V1, P1V1/T1=P2(2V1)/T2
JoannaBlackwelder
  • JoannaBlackwelder
Does that step make sense?
anonymous
  • anonymous
yes
JoannaBlackwelder
  • JoannaBlackwelder
:-) Can you try plugging in the expression for T2?
anonymous
  • anonymous
T2= P1V2T1/P2V1
JoannaBlackwelder
  • JoannaBlackwelder
Not solve, substitute.
Melodious
  • Melodious
joanna
anonymous
  • anonymous
:c
Melodious
  • Melodious
that question i didnt understand
Melodious
  • Melodious
:c
anonymous
  • anonymous
He wants to complement the question one word
Melodious
  • Melodious
ur a boy?
anonymous
  • anonymous
yup
JoannaBlackwelder
  • JoannaBlackwelder
P1V1/T1=P2(2V1)/(2T1) Do you see how I subbed that in?
JoannaBlackwelder
  • JoannaBlackwelder
Since T2 is 2T1
anonymous
  • anonymous
oh, yeah
JoannaBlackwelder
  • JoannaBlackwelder
:-) So, can you simplify?
anonymous
  • anonymous
no :c
anonymous
  • anonymous
I can't :c
Melodious
  • Melodious
which grade chemistry ur talking about?
Melodious
  • Melodious
pls say
JoannaBlackwelder
  • JoannaBlackwelder
|dw:1434392830978:dw|
JoannaBlackwelder
  • JoannaBlackwelder
I meant |dw:1434392864965:dw|
Melodious
  • Melodious
nice idea jo!!!
JoannaBlackwelder
  • JoannaBlackwelder
Thanks. :-) The 2's cancel|dw:1434392913865:dw|
JoannaBlackwelder
  • JoannaBlackwelder
Does that make sense?
Melodious
  • Melodious
yeah
Melodious
  • Melodious
but which grade chemistry is this?????????
JoannaBlackwelder
  • JoannaBlackwelder
That's good, @Melodious but I was asking @soso707
anonymous
  • anonymous
yes @JoannaBlackwelder
Melodious
  • Melodious
pls say which grade
JoannaBlackwelder
  • JoannaBlackwelder
Great! So we are to |dw:1434393062140:dw|
JoannaBlackwelder
  • JoannaBlackwelder
Any ideas from here?
Melodious
  • Melodious
nope i think
anonymous
  • anonymous
no complete
JoannaBlackwelder
  • JoannaBlackwelder
Please give it a shot. It is against policy to just give you the answers and we are mighty close to the answer.
anonymous
  • anonymous
Gay-Lussac's law ?
JoannaBlackwelder
  • JoannaBlackwelder
No, we just need to simplify what we have so far.
JoannaBlackwelder
  • JoannaBlackwelder
Using algebra
anonymous
  • anonymous
|dw:1434393687091:dw|
JoannaBlackwelder
  • JoannaBlackwelder
Where did the equals sign go?
anonymous
  • anonymous
We unite place.
JoannaBlackwelder
  • JoannaBlackwelder
I don't understand what you mean.
anonymous
  • anonymous
I mean T1
JoannaBlackwelder
  • JoannaBlackwelder
I still don't understand what you are trying to say. Can you show me?
anonymous
  • anonymous
|dw:1434394032412:dw|
JoannaBlackwelder
  • JoannaBlackwelder
Hm, no, the equals sign can't just disappear.
anonymous
  • anonymous
so wahat ?
JoannaBlackwelder
  • JoannaBlackwelder
If we multiply both sides by T1, what happens? |dw:1434394220901:dw|
anonymous
  • anonymous
aha
JoannaBlackwelder
  • JoannaBlackwelder
:-)
anonymous
  • anonymous
There will be less pressure?
JoannaBlackwelder
  • JoannaBlackwelder
How do you get that?
anonymous
  • anonymous
just I think that
JoannaBlackwelder
  • JoannaBlackwelder
No, that's not what I get.|dw:1434395143188:dw|
JoannaBlackwelder
  • JoannaBlackwelder
|dw:1434395174203:dw|
anonymous
  • anonymous
yeah
JoannaBlackwelder
  • JoannaBlackwelder
Is there anything else that can cancel?
anonymous
  • anonymous
I think, no
anonymous
  • anonymous
or V1?
JoannaBlackwelder
  • JoannaBlackwelder
Right, great!
JoannaBlackwelder
  • JoannaBlackwelder
So, what does that leave us with?
anonymous
  • anonymous
P1=P2
JoannaBlackwelder
  • JoannaBlackwelder
:-)
anonymous
  • anonymous
so what now ?
JoannaBlackwelder
  • JoannaBlackwelder
What do you think that means?
anonymous
  • anonymous
that the pressure same ?
JoannaBlackwelder
  • JoannaBlackwelder
Yep
anonymous
  • anonymous
so : what would be the pressure of a given mass of a gas, if its volume and temperature are doubled same pressure ?
JoannaBlackwelder
  • JoannaBlackwelder
Yep, or "pressure is constant"
anonymous
  • anonymous
thanks a lot @JoannaBlackwelder :)
JoannaBlackwelder
  • JoannaBlackwelder
You're very welcome :-)

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