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ProPM
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I know how temperature, volume and pressure are related and I think (think because I haven't tried any exercise alone yet) I can apply PV = nRT with no problems. But usually I am not able to apply a formula until I understand how I got to it, what it means.
I'd like to start from the beginning: These are my thoughts:
Boyle's Law: P1V1 = k, since k = PV, we can replace k by PV:
Applying the same logic, we get the two other rules in the same format:
and:
If we multiply all of them together: (PV / 1) x (V / T) x (P / T), we get:
And taking the square root of both sides, we get the Universal Gas Law
Now, (provided the above is correct ) Is where I get confused.
I have to go from there to the famous: PV = nRT
From what I remember my teacher saying,
Well, in summary I think. My doubt is how, or to what, P1V1/ T1 is proportional to - where is the constant? Did it get "carried over" from the initial equations that have constants?" And then, where the n appears.
I hope I didn't make things VERY confusing...
Thanks a lot,
ProPM
I'd like to start from the beginning: These are my thoughts:
Boyle's Law: P1V1 = k, since k = PV, we can replace k by PV:
P1V1 = P2V2
Applying the same logic, we get the two other rules in the same format:
V1/ T1=V2/ T2
and:
P1/ T1=P2/ T2
If we multiply all of them together: (PV / 1) x (V / T) x (P / T), we get:
P21V21/T21= P22V22/T22
And taking the square root of both sides, we get the Universal Gas Law
Now, (provided the above is correct ) Is where I get confused.
I have to go from there to the famous: PV = nRT
From what I remember my teacher saying,
P1V1/ T1 is equal to a constant, as well as equal to P2V2/ T2
We could then replace constant with the letter R and to get the n apply Avogadro's Law I guess?Well, in summary I think. My doubt is how, or to what, P1V1/ T1 is proportional to - where is the constant? Did it get "carried over" from the initial equations that have constants?" And then, where the n appears.
I hope I didn't make things VERY confusing...
Thanks a lot,
ProPM
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