Does anyone understand the ideal gas constant/law?
I know that it is pv=nRt. I am so lost with calculating this and what units to plug in for R. O.O8206 ATM,8.314 KPA,62.326mmHg. I know how to cross multiply but am so lost with this? Are there any websites that actually break it down into steps I can follow?
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Thanks but I still don’t comprehend it. I am so confused.
The key thing is to ensure every variable uses the same numbering system (like SI units for example). Another thing to check it out is units on both sides of (any) equal side need to be the same. So, PV is pressure times volume or something like pounds/square inch times cubic inches so the left side of the equal side should be pound inches (or a force unit times a linear unit).
Keep track of the units of measure in your equation – liters, atmospheres, etc. Make sure that the value chosen for R is consistent with the units being used for the measurement system.
Units in the numerators “cancel” with units in the denominators so that you end up with the correct unit. If you are solving for volume then you should end up with liters, or whatever unit is being used for volume.
Look at the example given here and notice how the units cancel. This idea is also helpful in converting units. For example, if you 5 liters and you want to convert that to ml. You can write 5 L * 1000 ml/L. The L’s cancel and you end up with 5000 ml.
Go metric. Once you get the units compatible, the math will work itself out.
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