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Why enormously high temperature necessary for fusion reaction to take place?
Wiki User
∙ 12y ago
Because the nuclei involved have to be squeezed very hard together, to overcome the repulsion that similar charges naturally have for each other (ie electrostatic repulsion). In fact in experiments on earth with tokamaks, the pressure is not high but temperatures have to be made extremely high, higher than in stars where pressure at the star's centre is very much higher than can be achieved on earth. This is to encourage the nuclei to get close enough for fusion to occur, but so far on earth only short bursts of fusion have been achieved, whereas the sun has been burning for billions of years.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoI believe it has something to do with stability, But as per new information, It doesn't necesarliy have to happen at high temperatures anymore. The NIF Facility in Livermore in California has recently sucessfully performed COLD Fusion, which is Fusion without the Super-High, Metal Melting temperatures. It is MUCH MUCH lower. So yeah. EA Game's Generals' USA faction's Cold Fusion Reactor is now a possibilty.
Note that the claims of low-temperature "Cold" fusion are as yet still unsubstantiated. Those claiming such advances are suspiciously secretive of their work; so much so, that they have the appearances of charlatans.
NIF is working not on "Cold" fusion (which is the premise that fusion can happen at relatively low temperature and pressure, no more than found inside a typical Internal Compustion Engine), but is instead experimenting with laser-compression fusion. LCF is a process where a small pellet of hydrogen is hit with several lasers for a very brief instant, compressing the hydrogen radically, to allow for fusion. In an LCF reactor, the hydrogen fuel is compressed to several thousand atmospheres by this laser, though the reactor itself isn't pressurized in the conventional sense.
Based on our current understanding of fusion, high temperature OR high pressure are required to overcome the natural repulsion of hydrogen nuclei. That is, to be able to push two hydrogen nuclei together, either enormous pressure is required, or extreme temperatures which change the matter composition and characteristics of hydrogen. No scientific basis for low-temperature or low-pressure fusion has ever been published or publicly demonstrated.
Wiki User
∙ 13y agoExtremely high temperatures and pressures are required for nuclear fusion reactions to occur. The reason for this is that the forces that must be overcome for fusion to occur are monumental on the atomic scale, and only under conditions of extreme heat and pressure can nuclear fusion occur.
Wiki User
∙ 12y agoenormous energy is needed for fusion since nucleus is very very stable.
more energy is reqd to make the already stable nucleus to make a nuclear bond.
Gases need to be exposed to temperatures of approximately 150 million degrees ºC to completely ionize the atoms that is why enormous energy is needed for fusion.
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The amount of heat necessary to change 1 kg of a solid into a liquid at the same temperature is called the?
molar heat of fusion
What F-word is defined as nuclear reaction in physics?
The word you're looking for is... Fusion
If fusion could provide earth with clean energy for thousands of generations why don't we start using it now?
The problem is that, although there are a range of different techniques for fusion, most of them produce less energy than is required to sustain the reaction. The most promising systems are "hot" reactors. The reaction takes place under conditions of very high temperature and pressure and it is difficult to safely contain such reactions. There are plans to build a prototype reactor that will produce a net energy output for "many minutes" but, alas, we are several years (possibly many years) from commercial fusion power stations.
Energy is released when smaller nuclei join to form a larger nucleus in a process called what?
Nuclear fusion
What is the process that A star turns matter into energy?
A nuclear reaction - either fusion or fission - is required to turn matter into energy.
What two things are necessary for fusion reaction to take place in a star?
Fusion will ignite when the temperature and pressure are high enough.
Does the nuclear fusion occurs at the surface of the sun?
Fusion takes place in the core, where the temperature and pressure are much higher, which is necessary for fusion.
Is nuclear chain reaction is called fusion?
The idea of nuclear fusion occurring at room temperature is called cold fusion.
Why is it difficult to develop a fusion reactor for power generation?
Fusion reaction requires very high temperature to take place .(approx. the temperature at the surface of the sun).This is practically impossible.
What is one obstacle that is used in nuclear fusion?
temperature/pressure needed to start reaction.
What is the temperature in a hydrogen bomb?
At the instant of detonation, the temperature at the core of the fusion reaction is high enough for the fusion of deuterium with tritium, and of tritium with tritium (50,000,000°C and 400,000,000°C, respectively.
The amount of heat necessary to change 1 kg of a solid into a liquid at the same temperature is called the?
molar heat of fusion
I am what is being investigated to contain fusion reaction?
You are most likely referring to a magnetic confinement fusion device, such as a tokamak or a stellarator. These devices use powerful magnetic fields to confine and control high-temperature plasma, enabling the conditions necessary for a controlled fusion reaction to occur. Scientists and researchers study and investigate these devices in order to develop a viable and sustainable method of achieving nuclear fusion as a clean and abundant source of energy.
Can nuclear fusion be controlled in the laboratory?
basically fusion reaction needs high temperature ,now a days number of experiment can be done on it ,according to scientists laser can creat such a large temperature,also we can use catalyst .
How hot does a fusion reaction have to be?
The basic answer is that nuclear fusion can only occur at VERY high temperatures like MILLIONS of degrees. You can relate it to the sun where the sun is around 10mil degrees and bonds hydrogen atoms to form helium.
What is the major problem with fusion reactions as an energy source?
Problem on nuclear fusion is upon confinement of reaction in earth atmosphere. Nuclear fusion required very high temperature to initiate the reaction. Sustaining reaction is not easy. It is likely the earliest nuclear fusion will be available commercially by 2050. It is a little far future for the current energy crisis would reach it peak around 2040.
What causes radioactive explosions?
An uncontrolled neutron chain reaction in a supercritical mass of fissile material.Very high temperature and pressure, enough to ignite thermonuclear fusion in fusion fuel.
