Month: May 2007

Determining the Ethanol Properties: What you Need to Know

There are actually a number of different ethanol properties that are of serious importance, and it should be known first off that there are both chemical and physical ethanol properties that need to be taken into account. For instance, the first thing that you need to know is that ethanol is a monohydric primary alcohol, and it melts at -117.3 C and boils at 78.5 C.

More Information on Ethanol Properties

As well, in regards to what you need to know about ethanol properties, another one of the most important factors in reference to ethanol properties is the fact that ethanol is miscible, in that it mixes without separation, with water in all proportions and it is separated from water only with difficulty.

Basically, any ethanol that is completely free of water is called absolute ethanol, and it is incredibly important to know that ethanol forms a constant boiling mixture, or azeotrope, with water that contains at least 95% ethanol and 5% water, and which boils at 78.15 C; since the actual boiling point of this binary azeotrope is below that of pure ethanol, then thus absolute ethanol cannot be obtained by simple distillation.

However, you should not feel as though there is no way around this; if benzene is added to 95% ethanol, for instance, a ternary azeotrope of benzene, ethanol, and water, with a boiling point of 64.9 C can then form, since the proportion of water to ethanol in this particular situation is greater than that in 95% ethanol, then the water is then able to be removed from the ethanol by adding benzene and distilling off this azeotrope.

Basically there are many different properties, all of which are highly relevant to the matter of ethanol overall, and all of which must be properly understood in order to gain any sort of actual realization on the issue of ethanol in general. Furthermore, ethanol is a rather complex subject, and because it is going to be even more popular within only years, it is thus incredibly important that everyone try to learn as much about it as they can before this happens.

In order to find out more information on ethanol, there are many different things that you can do, with the best choice being to simply read and research on it yourself; you can go to your local library, or even use the Internet from the comfort of your own home and browse through the multitude of information that is offered to you on there.

Replacement Lamp: A Costly Part

In the last few years, there has been a marked drop in the prices of projectors and, one can now easily pick up a piece for under a thousand dollars. However, there has not been a corresponding drop in the prices of replacement lamps even though some pieces can be bought for less than three hundred dollars. Most, however, are in the three hundred and fifty dollar to four hundred dollar range and, are unlikely to become cheaper in the foreseeable future. This has shocked buyers of projectors who find the cost of replacement lamps to be as much as high as half the cost of the projector itself.

High Prices And Lots Of Confusion

The high prices of replacement lamps have caused customers no end of confusion as well as irritation since none of them wish to pay four hundred dollars for obtaining a replacement lamp. However, one can deal with this problem adequately if; one budgets, anticipates as well as puts the cost into perspective. A projector will require maintenance and, are not like maintenance-free television sets that may last a decade or so without any further costs. Most projectors may require having their lamps changed every once in a while and, they also require cleaning the air filters, every month or so.

On an average, the lamp will last two thousand hours though on new projectors, one may be able to get three thousand hours of usage and, one may even be able to get five thousand hours usage. So, one should operate the projector in a warm environment and also have adequate ventilation and, keep it at a high elevation to prolong the life of the lamp. One should ensure that the air filter is properly cleaned to keep the longevity of the lamp at desired levels.

If one operates the projector for as many as ten hours in a day or more, one will certainly burn up the lamp faster and, thus need to get a replacement lamp before it has lasted for its expected life. However, for the typical home theater enthusiast, the need to have a quick replacement lamp should not arise before it has been used for quite some time.

It is thus necessary to estimate, when buying a projector, the intended hourly usage of the projector and, ascertain the average lamp life from a dealer. This will give the buyer a good idea as to how long it will take before it becomes necessary to buy a replacement lamp. With proper estimation as well as careful usage of one s projector, there should be no reason why one cannot enjoy the huge video images at home or in the office or in a classroom without the need for spending on expensive replacement lamps.