Equilibrium vapor pressure and surface tension from cluster data: Density functional results

2008 ◽  
Vol 129 (15) ◽  
pp. 154507 ◽  
Author(s):  
Ismo Napari
Author(s):  
V. R. Matricardi ◽  
G. G. Hausner ◽  
D. F. Parsons

In order to observe room temperature hydrated specimens in an electron microscope, the following conditions should be satisfied: The specimen should be surrounded by water vapor as close as possible to the equilibrium vapor pressure corresponding to the temperature of the specimen.The specimen grid should be inserted, focused and photo graphed in the shortest possible time in order to minimize dehydration.The full area of the specimen grid should be visible in order to minimize the number of changes of specimen required.There should be no pressure gradient across the grid so that specimens can be straddled across holes.Leakage of water vapor to the column should be minimized.


1966 ◽  
Vol 31 (2) ◽  
pp. 196-201 ◽  
Author(s):  
DAVID F. DYER ◽  
DEWEY K. CARPENTER ◽  
J. EDWARD SUNDERLAND

2000 ◽  
Vol 113 (5) ◽  
pp. 2021-2024 ◽  
Author(s):  
Justin B. Hooper ◽  
John D. McCoy ◽  
John G. Curro ◽  
Frank van Swol

1961 ◽  
Vol 39 (11) ◽  
pp. 2290-2294 ◽  
Author(s):  
K. Grjotheim ◽  
O. Herstad ◽  
J. M. Toguri

The equilibrium vapor pressure of magnesium over the reaction between the calcined dolomite and aluminum was measured by means of the transportation method. In the temperature range 886–1035 °C, the reaction was found to proceed according to the equilibrium[Formula: see text]and the measured equilibrium pressure of magnesium can be expressed by the equation[Formula: see text]


1968 ◽  
Vol 46 (14) ◽  
pp. 2399-2407 ◽  
Author(s):  
A. N. Campbell ◽  
E. M. Kartzmark ◽  
S. C. Anand ◽  
Y. Cheng ◽  
H. P. Dzikowski ◽  
...  

The following properties have been investigated experimentally: density, change of volume on mixing, vapor pressure, surface tension, and viscosity, at temperatures above and below the critical solution temperature. The question at issue is: How does the chemical potential, or any property dependent on chemical potential, change, at constant temperature, over a range of composition, just above the critical solution temperature? In the present case, the vapor pressure and surface tension, properties directly dependent on chemical potential, are constant within the range of experimental accuracy (which, however, may not be sufficient) over a range of concentration. The viscosity is complicated by the occurrence of anomalous viscosity. The change of volume on mixing is negative, and this is usually associated with compound formation. In all other systems investigated by us, except the system triethylamine–water, ΔV is positive. We have shown elsewhere, however, that a very stable chemical compound is formed between water and triethylamine.


Sign in / Sign up

Export Citation Format

Share Document