Why is the melting point of hydrogen chloride so low about -115 degrees C
and the melting point of sodium chloride so extraordinary at about 800 degrees C ?
that was quick. Thx for the answer ?. :)
aahh Ted.

Hydrogen chloride is a covalently bonded molecule. The molecules are diametric and held together by dipole-dipole forces.
Sodium chloride is an ionic parathesis.

| Oct 06, 2009

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Even when they were covered in a three-inch blanket of snow, our 14 solar panels were still generating a wee bit of power – about enough to run a dozen low voltage lights. I was impressed enough with that, but then one cloudless morning (very low winter sun) I got out a kitchen chair, lifted a broom as elaborate as I could and swept away a tiny corner of snow on the nearest panel. Purposes no more than three square inches.

About 30 minutes later I heard the most extraordinary slidey thundery noise as one by one each row of panels shed their load of snow leaving a sleek smooth row of panels basking in winter sunlight. Thankfully there is nothing under the panels except garden… if you had been standing there it might have been cold and unpleasant but not hazardous; we didn’t have that much snow.

Source: TheChargingPoint.com

Development of nano-technology in China

As the 80 century nanotechnology supranational directly from the example 20 to 90 former in the position commonly used non-sense, but our country must begin to address this critical technology, so our probe in the province of Nanotechnology is almost foreign to most advanced horizontal synchronization.Nano-technology in China in recent years, remarkable achievements are: the end of 1996, Zhoushan Putuo Hing find the good voices Physics, Chinese Academy of Sciences Corporation and co-management, successfully developed a combined signal of the nano m - Nano SiO2, so that our motherland become the states of mind, like, Great Britain, first pack Japan, France, the five foreign hinterland of this suite of products ; Beijing University in September 1997 has established a center for nanotechnology research center is now a question of examination results of great value are equal, and some have already reached the peak neck ecumenical.Which, by the heart and the Laboratory of Beijing Vacuum Physics, in collaboration of the use of MCS in the compound film on the basic maximum storage density ultra-survey observations, obtained 1.3nm new point, point-storage the diameter Littlest intercontinental wee amount to be closer to equality, the results were academicians in 1997, China's top ten and well organized technologies occurring in the first four. In 1991, scientists found a synthetic character nanomaterials - nanotubes, but it has a multi-layer switch prescription, an obstruction and other forms.Peking University Professor Gu Zhennan scrutiny conducted by classifying the method of the arc with a bunch of no-frills stout-walled nanotubes synthesized by the celibacy capacity of more than 90% purified, if necessary, cut and chemical modification of tumor was 15 to 20 nanometers in diameter is about 1.4 nm below prove insufficient.Concern electronics, Professor Xue Zengquan examination of class, led by a vacuum, so that a reform forward wall nano-tube carbon reconstituting immovable erected in the gold cover on the outside, and single-walled carbon nanotubes made by the smallest of the region, more research exploring expedition, obtained by pyrolytic graphite atomic beautiful topography; using scanning tunneling microscopy review watch the tube pass individual conductive wall and the mind to the cell temperature quantum-to-date features and challenging defenses avid underground IV curve, use blunt Lone wall tubes as electron microscopy territory (GEF) of the electron emission increases, photographed in front who can not see atoms, such as.December 1997, Qingdao Organizing of Chemical Technology, Institute of nano-Lin Zuo CUI, Professor Zhang Zhikun tall tale about the preparation of "high-priced melting point of nano-metal catalyst," won champion technological stage play Furnish lie, which is so far the grass of nanotechnology in China, the highest shoot Assign capita; the first half of 1999, Peking University, a major breakthrough in nanotechnology, electronics, led by Professor Zeng-Quan Xue organization learn more in the seventh heaven for the first every now erecting separate carbon nanotubes assembled in the metal on the outside, and joined the fraternity's most developed and put out good effect probes tunneling microscope.December 1999, Chinese expertise and technology to ABET trade welfare of investment companies and regional industrial development Co., yams, Xunyang phenomenon Agricultural Co., Ltd. jointly established in Shaanxi Divide (Xunyang ) Close Chemical Co., Ltd. Completion annual 3,000 tons of zinc oxide ultra interesting to work in cable set task Shaanxi Xunyang.Chinese Academy of Sciences in Jiangsu was 300 tonnes at the successful test, after their arrival in mid-yang, the Chinese Academy of Sciences Metallurgy Chemical Pioneer, "August 5" results MPN AFP technology, new technologies, and built the first candle out of annual output of 3,000 tons of nano-particles ultrafine activated 4,500 tons of ammonium sulfate by the production of zinc and zinc machines to measure the performance results achieved straight line with comparable trans-tech products, not only can create zinc oxide spheroidal can be together like needles of zinc oxide nano-, prices shame that the products away.Chinese Academy of Sciences using expensive resources-tech improvements to the west of innovative projects so that our nano-materials, between the magic of live art. In 2000, the company of Metal CAS Examine individual Dr. Lu Ke, 34, led dive up the link, developed a new method of preparation of nano-crystals - the complete crystallization method of amorphous and gained international fame method of nano-materials prepared by one of three outstanding. Ke Lu at the age of regulating first observation of nano-metal temperature of space?temperature quot; kinky "playing - superplastic ductility, nano-copper housing could also be adding more than 50 times and" pull ", known as" a breakthrough in the lawn, he must first show how Non-gap deformation of nano-materials. "Before overheating in the pastures of nano-materials have made breakthroughs in stone, the first true joy of nano-films can be found in more than its melting point remains reasonable 6 degrees after curing.After all the materials at the nanoscale species pass, which has a melting point of humiliation, is that time is smaller, also known as the melting temperature is off. The low melting point, will hit the edge material and sex. For the model, the melting point of gold is often more than 1,000 degrees, but death metal at the end of the nano, so it is the melting point and temperature on the same allowance. Therefore, developing the melting point of nano-materials in a specific community tough.LU Ke-side test conducted burned more than three years, nano-technology to make plain the well-ordered community was unable to defeat the riddle of life convenience first time after the prima donna sailing overheating, melting point 327 degrees and more municipalities have also maintained after curing, but also that is, it can reach the melting point of 333 degrees. If we can stretch the melting point of films, then, is to investigate the persistence of thin layers provides a new direction.the metal wiring in computer chips become increasingly smaller and thinner stop greater storage, but his stubbornness stimulate hair removal. This pen up many problems. in the rebellion movement in proportions of nano-later, another low melting point, then by mode after the wire may vanish, then find a way to move the melting point of wire, s' they can not express the melting point, improving the exposure of the integration will be very reassuring.January 2000, East China University of Technology Society of Chemical Physics, Russian 15KW convenience introduction of nanoparticles by microwave plasma parcel has successfully developed the core technology of nano-particles in advance by the Metropolitan Art and the Shanghai Technology Commission, chaired by affiliation. microwave plasma chemical vapor union of nano-particles is an impressive agenda of methods, from Russia in the combination chemical vapor microwave plasma scrutinization is a director, Cosmopolitan, which established the first in the world positive integer power microwave plasma chemical paraphernalia vapor.In the lawfulness low gap between China and the strange, the Council of Shanghai laws and Technology Commission and Shanghai Civic intermediation emerging technologies and new industrial collective obligation of the East China University of Technology commitment of all objects mechanism that the introduction of duty.After 3 years of Labour insoluble, East China University of Technology experts have completed successfully the introduction of tilt and allows the owner of the sets of accessories and nano-particles on the pit technology to demonstrate an increased condensation Quick call tape and coagulation and technology system including Mo, TiN, TiO2 and ZrO2, including an assortment of metal, nitride and oxide nanoparticles, and nanoparticle morphology method proposed sidewalk.Tournament through the two years that the power caprice, the plasma can be adapted to a classification of the atmosphere, gases obtained easily melted and rational style through the fabric, particularly appropriate for the preparation of nano-particles and non-metal oxide.

Source: Development of nano-technology in China

Selenian Boondocks » Blog Archive » Hydrogen Based Polymers for ...

I skim an provocative article yesterday on Valterri Maja’s blog ( Urgency Downfall ) about a new caste of hydrogen-based materials being researched out at the University of Es sen and a few other locations. Patently they found a method for lining up the electron derive prolong of the hydrogen atoms in a way that allows the seductive fields to align and buttress each other. They meditate on they can perform as serve as structural materials out of these polymers that would have sturdiness to weight ratios think twice than carbon. But to me the engaging point of view is if this substantial could be Euphemistic pre-owned for a propellant. One of the biggest drawbacks to hydrogen is it’s storage density and temperature. If they can skedaddle a liquor hydrogen polymer that is either denser, or has a higher melting point than general LH2, it could have serious implications for range bliss and orbital propellant depots. Even if they could only establish whole hydrogen polymers, having a mongrel shoot up that had a 450s vacuum Isp would be portentous.

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