order for a chemical reaction at all was possible, it is necessary that the particles of the starting materials (atoms, molecules) have come into contact.One can easily understand that the higher the concentration of these particles (i.e., the greater their number per unit volume), the more often will occur the contact and thus increase the reaction rate.So, if you want to reduce this rate, you need to reduce the concentration of the reactants.For example, increasing the volume of the vessel where gases react or diluted solution wherein the reaction proceeds.
There are many reactions that occur at
an appreciable rate only in the presence of special substances - the catalysts.These agents initiate and accelerate the reaction, although the process is not in her spent.In contrast to them, there are so-called "inhibitors" - agents which slow down the reaction.For example, the widely used "corrosion inhibitors", which are many times decrease the rate of oxidation of metals in air and in water.
greatly affects the rate of reaction of such factors as temperature.For many homogeneous reactions acts of so-called "rule of van't Hoff," according to which, when the temperature rises to 10 degrees, the reaction rate can be increased from 2 to 4 times.Accordingly, the cooling of the reaction zone will lead to the opposite result: the reaction is slow.
The laboratory practice is widespread way to a quick stop following reactions: place the tube or flask with the reactants into the vessel with ice.Of course, the reaction vessel should be made of refractory glass, good resistance to sudden changes in temperature.
order for a chemical reaction was slow, it is also possible to reduce the area of contact between the reactants.Here's a good example: thick logs burn slowly, first obuglivayas the surface.If you put in a fire thin dry branches (equal to the volume of the log), they burn up completely in much less time.Why so, because the amount of wood the same in both cases?But the fact that the area of contact with oxygen in the air at the thin branches was significantly greater.Accordingly, the oxidation reaction (combustion) in the first case was much slower.
Tip 2: How to slow down the music
If you decide to focus on creating music using computer programs or to reduce the existing composition, you probably will not again have to face the need to speed up or slow down anypart of the audio file.This can be done in many ways, starting with standard Windows tools and ending with specialized programs.
- computer, audio editor, a composition for slowing down.
Download and install any program to edit audio files.You can use as a challenging professional programs (such as Adobe Audition or Sony Sound Forge), and their free counterparts (Audacity or WavePad).Also for slow songs on your computer, you can use the DJ software.With them, you can add individual sounds or even to rewrite part of the composition.
Run the program and open it to the track you want to edit.With the cursor, the desired part of the audio file by clicking the left mouse button and drag to the end of the desired part.You can slow down the song as a whole, and its 3-second interval.
Copy the selected segment with the editing function of the program, or simply press Ctrl + C.Create a new file and paste the copied fragment.In the menu, select "Stretch» (Process / Time Compress / Expand, if the program does not Russified) and set a longer time setting.Listen to the result of their actions and, if necessary, adjust the time period.
If required, insert the edited segment back into the composition.To do this using the "Cut" get rid of the old track and pressing Ctrl + V insert in its place the delayed part.If you make a mistake when you insert, press the key combination Ctrl + Z and repeat the action.
Save the file.When you save, you can set a different file format, change the sampling frequency, multi-channel set up, as well as set the ID3 tags.