What type of chemical reaction releases energy?
354239
If you are talking about heat energy then it's called an exothermic reaction.\n\nEndothermic reactions are the ones that absorb heat (i.e. they seem to cool things)
178651
Your question is not clear but I take it you want 2 know what happens when heat is applied to a chemical reaction. \n\nHeat increases kinetic energy in molecules. If you apply heat, bombardment of molecules increase and therefore the reaction is favoured. In terms of equilibrium in reversible reactions, the forward reaction is favoured.
1091635
One example is Photosynthesis, an endothermic chemical reaction. In this process, plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen. \n\nThis reaction requires a tremendous amount of energy, 572 kJ to be exact. \n\n\n2H2 + O2 = 2H2O + ENERGY\nThis is also an example of an exothermic reaction, a reaction that produces energy. It is also an example of what is called a combustion reaction, where a substance (in this case hydrogen gas) is combined with oxygen. You are probably familiar with this reaction through two tragic examples of the unleashed energy of the combustion reaction of hydrogen, the Hindenburg, and the spaceshuttle Challenger. \n\n\n\n\nCan we create Hydrogen from Water?\nOh Yes! It's the same chemical reaction, but run in reverse: \n\n2H2O + ENERGY = 2H2 + O2 \nNotice now that the requirement is for energy to be ADDED TO the reactants. This is an example of an Endothermic reaction. This means that we could use Water as a Fuel! IF (and this is a big if) we could find an easy way to convert the water to hydrogen and oxygen, then the hydrogen could be used as a clean fuel.\n\nOne way to convert Water to Hydrogen and Oxygen is through the process of Electrolysis - using electricity as the source of energy to drive the reaction.
9127
In nuclear reactions, MASS is converted into energy.
596796
Exothermic reactions produce heat, so the temperature of the reactants will become higher, i.e. hotter.\n\nEndothermic reactions absorb heat from the surroundings, so the temperature of the reactants will become lower, i.e. colder.\n\nFor a specific reaction involving Co(II), would have to know the reaction equation and then calculate the delta enthalpy.
756196
"Dacay" of uranium and fusion of hydrogen are called "nuclear" reactions. They are different from chemical reactions. In nuclear reactions, the mass of the particles after the reaction is always less than the mass of the particles before. The difference in mass is converted to energy in accordance with E=mc^2.\n\nIn chemical reactions, the mass of the particles is the same before and after the reaction.
964937
Cellular respiration is the process in which the chemical bonds of energy-rich molecules such as glucose are converted into energy usable for life processes. Oxidation of organic material—in a bonfire, for example—is an exothermic reaction that releases a large amount of energy rather quickly. The equation for the oxidation of glucose is:\n\nC6H12O6 + 6O2 → 6CO2 + 6H2O + Energy released (2830 kJ mol−1) \nIn a fire there is a massive uncontrolled release of energy as light and heat. Cellular respiration is the same process but it occurs in gradual steps that result in the conversion of the energy stored in glucose to usable chemical energy in the form of ATP. ATP is known as the universal currency because when the phosphoanhydride bonds in ATP are hydrolyzed in an exergonic reaction, the energy yield is 30kJ per mole under standard conditions. Waste products (CO2 + H2O) are released through exhaled air, sweat and urine.
76912
- Chemical (exchange of charge between substances across a barrier)\n- Electro-magnetic (electrically-induced magnetism turned into mechanical energy)\n- Photovoltaic effect (electrical charge generated in certain substances when exposed to light)
462388
A reaction which gives out heat is known as 'exothermic'.\n\nhttp://en.wikipedia.org/wiki/Exothermic\nhttp://en.wikipedia.org/wiki/Exothermic_reaction\n\nA reaction which seems to absorb heat is known as 'Endothermic'\n\nhttp://en.wikipedia.org/wiki/Endothermic\nhttp://en.wikipedia.org/wiki/Endothermic_reaction
747557
A reaction tends to be spontaneous if  it causes an increase in the entropy of the system, and/or a decrease in the enthalpy of the system \n\nBoth reactions are endothermic (increase in enthalpy) becuase of positive delta H values.\nBoth have an increase in entropy (positive delta S value for the first one, production of a gas for the second)\n\nSo I'd say statements ll and lll are true.
761935
when in a chemical reaction
870424
in electrochemical cells we have chemical reaction . since conversion of this chemical energy to electric energy is mainly becoz of combination of ions ..we hav electric on account of this chemical energy till we have free ions to combine once all ions of solution combines  no more energy conversion is there
28195
Electricity is a form of energy.\n\nIt can be generated from other forms of energy, for example, chemical energy (burning fuel, or a battery), mechanical energy (a windmill), nuclear energy (atomic fission reaction like in a power plant).\n\nIn a battery electrical energy is converted from the  potential energy stored in chemicals which is released when they combine.\n\nIn a fuel cell, chemical energy is released in another type of chemical reaction.\n\nNuclear plants, windmills, hydroelectric dams or burning fuel in a generator turns a turbine or motor which moves a coil of wire through a magnetic field which produces energy.\n\nIn thermoelectric energy, heat is turned into electricity when two different metals are heated.
920392
it is exothermic, meaning the combustion reaction releases energy in the form of heat
732299
The sign there is a chemical reaction is the fact there is heat being released.  Evidently, the reactant have more energy, because they are able to release that energy in the form of heat.
44655
Chemical bonds can form or break in a reaction. there are different types of reactions: \nSynthesis (A bond is formed between two substances, thus synthesizing) \nDecomposition (A bond is broken between two substances, thus decomposing)\nSingle replacement (a substance in a compound switches with a free substance)\nDouble replacement (substances in two compounds switch with substanced in another compound)\n\nEssentially, bonds are either formed, broken, or switched
511885
Energy can take the form of heat, light, vibration, momentum or sound. It can also be stored as potential energy. Anytime you interconvert among these forms of energy, you can say it is "transferred". Chemical reactions can include some or all of these, with chemical bonds representing stored potential energy.\n\nIn nuclear reactions, you can say that energy and matter are interconverted as well.