question archive 5) The pressure in interplanetary space is estimated to be of the order of 10-14Pa
5) The pressure in interplanetary space is estimated to be of the order of 10-14Pa
Subject:ChemistryPrice: Bought3
5) The pressure in interplanetary space is estimated to be of the order of 10-14Pa. Calculate (a) the average number of molecules per cubic meter (b) the number of molecules colliding per cubic meter per second (c) the mean free path in miles. Assume that the only hydrogen atoms are present and the temperature is 1000K. Assume molecular diameter = 0.2 nm.
6. In measuring the surface tension of a liquid (drop weight method), 20 drops of the liquid (r = 0.2cm) falling apart from the tip whose diameter is 0.4 cm were found to weight 0.95 gram. What is the surface tension of the liquid?
7. Calculate the viscosity (micropoises) of molecular oxygen at 273.2 K and 1 bar. The molecular diameter is 0.360 nm.
8. Compare the values obtained for the pressure (atm) of 2 mols O2 at 298.15K held in a 8.25 dm3 bulb using
a) Redlick-Kwong equation: For O2: Tc = 154.6 K; Pc = 50.43 bar
b) Beattie - Bridgeman equation
For O2, the Beattie - Bridgeman constants:
A0 = 0.14911 Pa m6 mol-2
B0 = 46.24 x 10-6 m3 mol-1
C = 4.80 x 10-1 m3 K3 mol-1
a = 25.62 x 10-6 m3 mol-1
b = 4.208 x 10-6 m3 mol-1
Use R = 8.314 Pa.m3/mole.k
