Diethyl ether,(C2H5)2O , vaporizes easily at room temperature. If the vapor exerts a pressure of 254 mm Hg in a flask at 25 °C, what is the density of the vapor?
Density = g/L
whats the density of vapor?
2016-06-22 9:10 pm
回答 (1)
2016-06-22 9:41 pm
(C₂H₅)₂O vapor :
Pressure, P = (254/760) atm
Gas constant, R = 0.0821 atm L / (mol K)
Absolute temperature, T = (273 + 25) K = 298 K
Molar mass, M = (12.01×4 + 1.008×10 + 16.00) g/mol = 74.12 g/mol
Density, d = ? g/L
PV = nRT
PV = (m/M)RT
m/V = PM/(RT)
d = PM/(RT)
Density, d = (254/760) × 74.12 / (0.0821 × 298) = 1.01 g/L
Pressure, P = (254/760) atm
Gas constant, R = 0.0821 atm L / (mol K)
Absolute temperature, T = (273 + 25) K = 298 K
Molar mass, M = (12.01×4 + 1.008×10 + 16.00) g/mol = 74.12 g/mol
Density, d = ? g/L
PV = nRT
PV = (m/M)RT
m/V = PM/(RT)
d = PM/(RT)
Density, d = (254/760) × 74.12 / (0.0821 × 298) = 1.01 g/L
收錄日期: 2021-04-18 15:11:30
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160622131032AAR8ovQ