Ethanol Saturation *Urgent* Help please
Ethanol Saturation *Urgent* Help please
(OP)
I am trying to calibrate a MQ-3 sensor with an arduino uno board, however I have to do a hand calculation to arrive at my theoretical ethanol content (amount of ethanol saturated in the air) before I can calibrate my sensor. The following data is what I have:
3- compound mixture-H20(11.27% or 50 ml) C2H5OH-(Ethanol)(11.27% or 50 ml) and Dry air (77.45% or 343.603ml)
The recording is taking place at room temperature. (23 C)
I am wanting to find the mass of ethanol saturated in the air.
I have tried using implementing the Ideal gas law to find the mass of the air then using the formula for humidity ratio (w=mass_vapor/mass_air) where w= (0.622*Pvapor)/(P-Pvapor)
Applying those three formulas I do get a result for the mass of ethanol in the air.
However I am not taking into consideration the volume of each compound in my mixture.
Is this answer I calculated correct? Or do I have to implement some other thermodynamic relationship involving the volumes or %compunds in my mixture??
3- compound mixture-H20(11.27% or 50 ml) C2H5OH-(Ethanol)(11.27% or 50 ml) and Dry air (77.45% or 343.603ml)
The recording is taking place at room temperature. (23 C)
I am wanting to find the mass of ethanol saturated in the air.
I have tried using implementing the Ideal gas law to find the mass of the air then using the formula for humidity ratio (w=mass_vapor/mass_air) where w= (0.622*Pvapor)/(P-Pvapor)
Applying those three formulas I do get a result for the mass of ethanol in the air.
However I am not taking into consideration the volume of each compound in my mixture.
Is this answer I calculated correct? Or do I have to implement some other thermodynamic relationship involving the volumes or %compunds in my mixture??





RE: Ethanol Saturation *Urgent* Help please
Dalton or Raoult perhaps.
RE: Ethanol Saturation *Urgent* Help please
RE: Ethanol Saturation *Urgent* Help please
RE: Ethanol Saturation *Urgent* Help please
RE: Ethanol Saturation *Urgent* Help please
RE: Ethanol Saturation *Urgent* Help please
RE: Ethanol Saturation *Urgent* Help please
RE: Ethanol Saturation *Urgent* Help please
RE: Ethanol Saturation *Urgent* Help please
RE: Ethanol Saturation *Urgent* Help please
RE: Ethanol Saturation *Urgent* Help please
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RE: Ethanol Saturation *Urgent* Help please
http://nequam.se/misc/ethanol.php
And a read at the link below:
http://symp15.nist.gov/pdf/p128.pdf
RE: Ethanol Saturation *Urgent* Help please
If this is all so, calculate an average molecular weight, calculate total number of moles = n = PV/RT, calculate the moles of C2H5OH = 0.1127n, calculate the mass of C2H5OH = moles of C2H5OH x MW of C2H5OH.
Good luck,
Latexman