ODYSSEY  High School Chemistry
Bug Fixes / Known Issues
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Molecular Labs
Lab 6, Ionic Radius for Different Oxidation States
The PDF-formatted worksheet that is linked at the bottom of the page is missing. (The corresponding Word files are available.)
Lab 21, Gas Pressure
The simulation of the 100 atom sample of helium goes "bad" (loss of thermal equilibrium) after ~150 ps simulation time.
Lab 35, Reactive Collisions between Molecules
Question #6: New energy values must be entered by editing the value field, rather than by using the slider.
Lab 42, Straight-Chain Alkanes
Question 6: The line drawing (for pentane) is missing.
Lab 44, Alkenes and Alkynes
The text-embedded controls for building isomers of alkynes (Questions 4–6) are non-functional.
Lab 44, Alkenes and Alkynes
Clicking on the Electron Cloud button in Question 8 will erroneously reset the display to the very first model of the experiment (which happens to be 1-butene). In other words, a "manual switch" back to either ethene or ethyne is required after requesting the display of the electron cloud.
Lab 47, Starch
The links at the bottom of the page to the Word- or PDF-formatted worksheet are non-functional.
Lab 48, Amino Acids
The links at the bottom of the page to the Word- or PDF-formatted worksheet are non-functional.
Lab 49, Protein
The links at the bottom of the page to the Word- or PDF-formatted worksheet are non-functional.
Lab 48, DNA
The links at the bottom of the page to the Word- or PDF-formatted worksheet are non-functional.
Tutorials
Tutorial 14, Compressibility
At the bottom of the page, it should say: From the View menu, select Properties, and from the Properties menu (lower left corner), select Thermodynamics Volume.
Tutorial 15, Intermolecular Forces, Page A
Contrary to what is described in the text, the sample of heptane gradually fills out the entire available volume, indicating a lack of cohesion during a room temperature simulation. The other two samples (DMSO and water) have sufficient cohesion for the molecules to stay together, but in each case the entire liquid blob slowly bounces around the simulation box.
Tutorial 33, Dynamic Nature of Equilibria
The equation at the bottom of the page gives the misleading impression that the rate constants for the forward and reverse reactions are the same. As correctly spelled out in the text, it is the rates (not the rate constants) that are the same.
Tutorial 37, Carbohydrates
A line drawing of glucose is not shown.
Applications
Application 7, Explosives
Some of the nitro groups in the model of solid TNT are erroneously shown with multiple double bonds.
Application 57, Refrigerants
2,3,3,3-Tetrafluoropropene (and not 1,1,1,2-tetrafluoropropane) should be shown as the refrigerant that is popularly labeled "HFO-1234yf".
Molecular Stockroom
Copper+Zinc and Zinc+Copper
In the "Individual Items" display mode, the corresponding entries are mistakingly labeled as "Copper+Tin" and "Tin+Copper".
Lead Compounds
The formula of lead sulfate is PbSO4 (and not PbS).
Mercury Compounds
Mercuric oxide, HgCl2, is labeled incorrectly as "Mercury(I) Chloride". (However, the shown structures of both molecule and solid are correct.)
Model Kit
Modifying Existing Models with the Solid Builder
Attempting to modify an existing model (for example, a model that was retrieved from the Molecular Stockroom) via double-clicking in the Solid build panel will lead to a program crash.
Functionality, Platforms, Licensing
Stereocenters (Macintosh version only)
The inversion of sterocenters (via the right-click menu or by double-clicking while holding down the Apple key) doesn't work.
Preferences Dialog
The first choice for the unit of length should be labeled "S.I." (for Système International), not "Si".
Spherical Clipping for Atoms in Vacuum Samples
The setting of clipping centers is not functional for samples under vacuum conditions (but clipping still works correctly for samples with periodic boundary conditions).
Display of Hydrogen Bonds within Clipping Spheres
Spurious ("spanning") hydrogen bonds are drawn if spherical clipping is turned on and the radius of the clipping sphere is relatively large.
Picking of Atoms in Models of Solids (Mobile Intel 945 Chipset only)
Because of an Intel graphics driver error, picking a surface atom in a solid may sometimes erroneously select an atom in the interior, namely if the two atoms have a coordinate that is identical. The usual "halos" indicate which atom(s) have actually been selected (for example, during distance measurements).
Picking of Atoms in Models of Solids (Windows version on Mobile Intel 945 Chipset only)
Because of an Intel graphics driver error, picking a surface atom in a solid may sometimes erroneously select an atom in the interior, namely if the two atoms have a coordinate that is identical. The usual "halos" indicate which atom(s) have actually been selected (for example, during distance measurements).