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engine123
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I’ve been scratching my head (and working in ms excel) about the following for about 6 hours and would greatly appreciate it if somebody could help me.
Basically, I am trying to figure out WHY the density of water is approximately one gram per cubic centimeter (at 1 atm pressure and 4 degrees Celsius).
Note the following conversions:
1 atm = 101,325.01 Pa = 14.7 psi
4 C = 39.2 F = 277 K
Also:
Gas Law Constant = 8.3145
Starting at the molecular level, water has a molecular mass of 18.015 g/mol.
Using the ideal gas law:
density = (pressure) (molar mass) / ((temp) (8.3145))
g/m^3 = (Pa) (g/mol) / ((K) (8.3145))
This is what I come up with:
density = (101,325 Pa) (18.015 g/mol) / ((277 K) (8.3145))
density = 792.56 grams per cubic meter
792.56 grams per cubic cm does NOT equal 1 gram per cubic centimeter.
Why?
Where did I go wrong?
Any guidance is greatly appreciated.
Basically, I am trying to figure out WHY the density of water is approximately one gram per cubic centimeter (at 1 atm pressure and 4 degrees Celsius).
Note the following conversions:
1 atm = 101,325.01 Pa = 14.7 psi
4 C = 39.2 F = 277 K
Also:
Gas Law Constant = 8.3145
Starting at the molecular level, water has a molecular mass of 18.015 g/mol.
Using the ideal gas law:
density = (pressure) (molar mass) / ((temp) (8.3145))
g/m^3 = (Pa) (g/mol) / ((K) (8.3145))
This is what I come up with:
density = (101,325 Pa) (18.015 g/mol) / ((277 K) (8.3145))
density = 792.56 grams per cubic meter
792.56 grams per cubic cm does NOT equal 1 gram per cubic centimeter.
Why?
Where did I go wrong?
Any guidance is greatly appreciated.