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The energy decreases the molecular motion and the kinetic energy of the substance.
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Which is always true of an endothermic reaction?
An endothermic reaction consumes energy, and the reduction of energy does lower temperature. Of course, the actual temperature of the chemicals in question may be subject to other simultaneous influences. If you have a solution in which there is an endothermic reaction taking place, but you are also heating the solution to help drive the reaction, you will not observe a lower temperature.
Why does a flame occur?
When a substance is subjected to heat the chemical bonds in it may break down and release energy. If oxygen is present then the release of heat energy will cause the oxygen to combust and produce a flame.
When an electron drops to a lower energy level what is the energy of the photon released?
The energy of the photon is the same as the energy lost by the electron
What is the meaning of chemical energy?
It's the potential of a chemical substance to sustain a transformation by a chemical reaction or, to transform other chemical substances. Batteries are an example. Making or breaking of chemical bonds involves energy, which may be absorbed or in other situation it may be evolved from a chemical system.
If a substance reacts with a metal to produce hydrogen gas what may you in infer about the substance?
You can infer that it is corrosive which means it can wear away.If a substance reacts with a metal to produce hydrogen gas, you may infer that the substance is corrosive.
Is it true that temperature is the measure of average kinetic energy of a substance?
Almost. Temperature is a measure of the average kinetic energy of the particles which constitute the substance. So the temperature of a block of Sodium Chloride is a measure of the average kinetic energy of the sodium and the chlorine ions which constitute the block, but temperature has nothing to do with the kinetic energy of the whole block, which may be dashing through the air at some enormous velocity.
What is a possible result of an atom that absorbs sufficient energy?
The atom may emit a photon.
Is it true that if an chemical reactions that absorb energy will not occur without a source of energy?
If a chemical reaction absorbs energy in order to be complete, the reaction will not occur in the absence of a source of energy. However, note that any environment substantially above absolute zero temperature contains potential energy, and this may be sufficient for the reaction, without requiring any spectacular specific energy source.
Why may the temperature of a substance change when energy is added?
Thermal energy of a substance is determined by the movement of the molecules and the potential energy of the arrangement of molecules. Heat transfer will stop when thermal equilibrium is reached. It depends upon the substance how long that takes.
How does the nuclear energy is turn into other energy such as electrical energy?
When an atom splits one of the forms of energy produced may be heat. This heat may be gathered by circulating a coolant substance such as water around or near the radioactive substance to produce steam. The steam is used to drive a turbine and the turbine drives an electical generator.
How you can prepare colliodal solution from true solution?
On excessive cooling may produce colloidal particles from true solution or a reaction with another substance may produce such solution.
Which change of phase is endothermic?
is Absorbs If you are asking if a change of state is why a reaction may be endothermic, is not always true. It simply depends on what the change of state is to and what it is from, ex: a change from liquid to solid is usually exothermic because it losses energy as the particles slow down and draw near to eachother... and the opposite occurs from solid to liquid (or liquid to gas).
Electrons exist only at fixed levels of potential energy However if an atom absorbs sufficient energy a possible result is that?
An electron may move to an electron shell farther out from the nucleus.
What term refers to the total kinetic energy of the particles in a material?
Thermal energy is the term for total kinetic energy in a substance, according to a 5th grade science book. There may be other forms of energy in a substance, but thermal energy is the total kinetic energy.Temperature is a measure of the average kinetic energy of the particles in a sample.
When a pendulum is at the center position what is true of the kinetic and potential energy?
If a pendulum is at its center position, then there are two possibilities: 1). It may be swinging. Then its kinetic energy is maximum and its potential energy is zero. 2). It may be stopped altogether. Then it has no energy at all.
When electron drops to a lower energy level what is the energy of the proton released?
You may be confusing "proton" with "photon". A proton is a positively-charged particle contained within the nucleus of an atom. A photon is a discrete unit of energy normally expressed as light. Around the nucleus of the atom, there are some electrons in energy levels. When an atom absorbs energy, it absorbs a specific amount, or "quantum" of energy and the electron boosted to a higher energy level. When the electron drops to a lower energy level, it emits a photon in the form of light at a specific energy and frequency.
Which is always true of an endothermic reaction?
An endothermic reaction consumes energy, and the reduction of energy does lower temperature. Of course, the actual temperature of the chemicals in question may be subject to other simultaneous influences. If you have a solution in which there is an endothermic reaction taking place, but you are also heating the solution to help drive the reaction, you will not observe a lower temperature.
