Asked by Tina

Would the R (PV=nRT)value go up or down if you had not corrected the gas for partial pressure of water? I was thinking down but im not sure
Answered by DrBob222
Why would R change at all. Isn't R a constant? You may be talking about something performed in the lab; if so you must give some indication of what you did and what you are trying to determine.
Answered by Tina
we collected butane gas using a funnel and graduated cylinder under water. then we had to determine the experimental R value and compare it to the constant
Answered by DrBob222
Based on what you told me (I've not performed this experiment),
PV = nRT so
R = (PV)/nT
If you did not correct the pressure you read for the room for the vapor pressure of water (don't you usually subtract the vapor pressure of water to obtain the partial pressure of the dry gas?), then you are placing too high a value for P and R will be higher accordingly.
Answered by Kate
What do you mean by correcting the pressure?
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