specific mass of ethanol in vapor phase
specific mass of ethanol in vapor phase
(OP)
Hello, I'm looking for data on :
- the specific mass of ethanol in vapor phase at boiling temeperature.
- emissivity of ethanol,
- combustion rate of ethanol.
Could you please help me?
Thanks.
- the specific mass of ethanol in vapor phase at boiling temeperature.
- emissivity of ethanol,
- combustion rate of ethanol.
Could you please help me?
Thanks.





RE: specific mass of ethanol in vapor phase
PRESSURE PSIA 14.69600
VAPOR FRACTION 1.000000
PROPERTIES TOTAL VAPOR
----------------------- ---------- ----------
Ethanol
MOLECULAR WT. 46.0680 46.0680
ENTHALPY BTU/LBMOLE 2196.5766 2196.5766
ENTROPY BTU/LBMO/R 3.9709 3.9709
CP BTU/LBMOL/R 17.9022
CV BTU/LBMOL/R 15.8045
CP/CV 1.1327
DENSITY LB/FT3 0.101325
Z-FACTOR 0.984370
VISCOSITY CP 0.007293
TH.COND BTU/FT/HR/F 0.010062
Not familiar with combustion rate, do you mean flame rate at stochimetric?
RE: specific mass of ethanol in vapor phase
safetystudies:
As a point of interest to augment dcasto's response , the density of a gas can easily be calculated by using this equation derived from the universal gas law:
lb/ft3 = (MW)(P)/[(z)(10.73)(deg R)]
where:
MW = Molecular weight of the gas
P = absolute pressure of the gas, in psia
Z = compressibility factor
deg R = absolute gas temperature = 460 + deg F
For your ethanol at atmospheric pressure and 173 deg F:
lb/ft3 = (46.07)(14.696)/[(0.984)(10.73)(460 + 173) = 0.1013
=======================================
In SI metric units:
kg/m3 = (MW)(P)/[(z)(8.3144)(deg K)]
MW = Molecular weight of the gas
P = absolute pressure of the gas, in kPa
Z = compressibility factor
deg K = absolute gas temperature = 273.15 + deg C
For your ethanol at atmospheric pressure and 78.4 deg C:
kg/m3 = (46.07)(101.325 kPa)/[(0.984)(8.3144)(273.15 +78.4) = 1.623
Milton Beychok
(Visit me at www.air-dispersion.com)
.
RE: specific mass of ethanol in vapor phase
For assessment of data with pool fires the following calculator may be of help:
http:
RE: specific mass of ethanol in vapor phase
As for vapor density it seems dimers and tetramers don't seem to affect the estimated/reported values. Any comment ?
RE: specific mass of ethanol in vapor phase
My main web source for chemical data is the Nist Webbook.
Do you know any other free source where I can find these kind of data?
Sincerely yours.
Cédric.