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Turnbull China Bikeride
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Turnbull China Bikeride - Disc 2.iso
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AVOGADRO
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CHEMISTRY
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UNITCONV
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!UnitConv
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ConvHelp
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1996-04-14
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Information is available on:
The Main Menu
General
Gases
________________________________________________
Note that if any read me files are
supplied as part of this application,
they may have more recent information
than is contained in this file.
UnitConv is © Chris Johnson, 1992
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This application provides interactive help when
the !Help application is active.
There are also other help displays with
appropriate information available from all other
menus associated with this application.
________________________________________________
General
Simply enter the value you wish to convert FROM
into the appropriate writable icon. The
corresponding value in all of the other units will
be continuously updated and displayed. A
particular value can be cleared using Ctrl U (hold
down ctrl and press U). Clicking MENU within the
convert window leads to a choice of various
classes of unit to convert, e.g. speed, length.
See below
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The Main Menu
The following options are available:
Energy
Pressure
Length
Mass
Volume
Speed
Temperature
Gases
Help - opens this help window
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Gases
Clicking on this option opens an additional
dialogue box. You may enter values for the
temperature of the gas, the pressure of the gas,
the size of the molecule, and the relative molar
mass into the appropriate icons and then click on
Calculate. Pressing <RETURN> is the same as
clicking Calculate.
If you have entered values for all four
parameters, then the following values will be
calculated.
Mean free path of the molecules.
RMS, average and most probable
velocities.
Collision frequency and the total
number of collisions in a cubic metre.
The program tries to be intelligent about what to
calculate. For example, the velocities require
only the temperature and the molar mass, whereas
the mean free path calculation requires
temperature, pressure and size of molecule. The
program calculates what it can, and leaves the
data fields blank if there is insufficient input
data for that calculation.
Clicking MENU in this window allows you to change
the default units used for pressure (atmosphere,
N/m² and torr) and size (pm, nm and m), and to
enter the size either as the diameter or cross
sectional area. If you choose to enter the size as
a diameter, the program assumes the molecule is
spherical.
Remember - we are dealing with the COLLISION
cross-section. This is effectively PI x diameter²,
since the distance between centres of colliding
molecules is 2 x radius.
Temperature is always entered as kelvin.
The window remains on-screen until explicitly
closed.
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