Chemical Kinetics 对比 Periodic-Table-Elements 的使用情况和统计数据
The “Chemical Kinetics” is an ultimate tool for solving all kind of chemical kinetics problems. It deals with time dependent quantitative analysis of chemical reactions. Specifically, this application solves chemical reaction rate equations and provides graphical representation of reagent and product concentrations vs time. Additionally, app calculates half-life times and equilibrium constants, where it is appropriate.
Theoretical Background:
For a general chemical reaction:
aA + bB => cC + dD,
the reaction rate is defined by:
rate=k * A^x * B^y
where k – is a rate coefficient and sum of powers x and y determines the reaction order. Importantly, actual powers x and y may differ from reaction coefficients a and b, due to overall reaction mechanism complexity.
The application features:
· User is provided with list of basic mono-step unidirectional and equilibrium reactions, where reaction coefficients are actually represent powers and therefore define reaction order:
2A => B, rate = k[A]^2
A+B = C+D, rate = k1[A] [B] - k2[C] [D]
· k1 is a rate coefficient of forward reaction in equilibrium process or rate coefficient for first step in multistep process. Similarly, k2, when available, is a rate coefficient of backward reaction in equilibrium process or rate coefficient for second step in multistep process.
· To start plotting the reaction data initially or after updating the concentration or coefficient fields, user is requested to tap Run button. Run button is greyed out immediately after successful calculation.
· Complete reaction information is provided on top of the plot: concentrations at certain time point (defined by user or provided automatically), optionally equilibrium constant value and half-life time.
· When time field is empty, the app automatically determines the time range. To redefine reaction time limit and find out component concentrations at the altrnative time point, user may update the time field.
· Significant attention should be paid to units of rate coefficients. App automatically changes the set of available units as per order of reaction.
Units acronyms: d - days, h - hours, a - atmosphere, s - seconds, min - minutes, y - years, M -molars, Pa - pascals.
· The basic conversions are as follows:
M-1·s-1 = (1e-3) mM-1·s-1 = (60e-3) mM-1·min-1 = (3600) M-1·h-1
1 atm=101325 Pa
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The PeriodicTableElements is an elegant app that is interactive and fun.
Easy to use, easy to understand, simple and effective.
It shows the periodic table of elements in variety of ways
1) Classic grid with name that is color coded. You can configure it to look however you like.
2) Visually appealing electron distribution.
3) Visually appealing Lewis dot structure.
4) List that can be sorted based on different element properties like group, period, category etc.
These awesome periodic tables can be shared by simple double click anywhere on the table.
It is possible to copy the periodic table diagrams as high quality SVG xml.
Drag your finger on the periodic table canvas to update elements automatically or tap on an element to see more details.
Tap on an element and all the rest of the related elements are highlighted.
Details of a selected element is shown in a beautifully drawn animated element.
Tap on the animated element and you will see more details that can also be shared.
Tapping on the list element will navigate you to a page that shows details of the element.
It automatically saves your hard work locally on your device so you can come back and pick up from where you left off as your great effort will not be lost.
This is a perfect app if you are a student learning chemistry.
This is an app for all student groups. From high school to college to university students.
Be creative. Enjoy the app!
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Chemical Kinetics VS. 
Periodic-Table-Elements十二月 23, 2024