What is the density and molar mass of a gas?
2016-12-16 5:41 pm
if 1.85 g of an unknown gas at 41 °C and 1.10 atm is stored in a 1.75-L flask.
回答 (3)
2016-12-16 6:03 pm
Mass, m = 1.85 g
Absolute temperature, T = (273 + 41) K = 314 K
Pressure, P = 1.10 atm
Volume, V = 1.75 L
Gas constant, R = 0.08206 L atm / (mol K)
d = m/V
Density, d = (1.85 g) / (1.75 V) = 1.06 g/V
PV = nRT
PV = (m/M)RT
PM = (m/V)RT
PM = dRT
M = dRT/P
Molar mass, M = 1.06 × 0.08206 × 314 / 1.10 g/mol = 24.8 g/mol
Absolute temperature, T = (273 + 41) K = 314 K
Pressure, P = 1.10 atm
Volume, V = 1.75 L
Gas constant, R = 0.08206 L atm / (mol K)
d = m/V
Density, d = (1.85 g) / (1.75 V) = 1.06 g/V
PV = nRT
PV = (m/M)RT
PM = (m/V)RT
PM = dRT
M = dRT/P
Molar mass, M = 1.06 × 0.08206 × 314 / 1.10 g/mol = 24.8 g/mol
2016-12-16 6:01 pm
PV = nRT
PV = (m/Molar mass)RT
1.1×1.75 = 1.85×0.0821×314/Molar mass
Molar mass = 24.775g/mol
Density = Mass/Volume = 1.85/1.75 = 1.05g/L
PV = (m/Molar mass)RT
1.1×1.75 = 1.85×0.0821×314/Molar mass
Molar mass = 24.775g/mol
Density = Mass/Volume = 1.85/1.75 = 1.05g/L
2016-12-16 5:43 pm
try google
收錄日期: 2021-05-01 13:06:34
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161216094107AAFinYF