yes it does
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No- some reactions ABSORB energy. In terms of heat energy, some are exothermic, and some are endothermic.
A chemical reaction that produces energy is said to be exothermic. In comparison, if it consumes energy it is endothermic.
An endothermic reaction is one that consumes heat.
Activation energy is needed to start a chemical reaction. This energy is used to join the reactants together or break them apart. If a reaction is exothermic then it gives energy out. If it is endo thermic then the reaction takes energy in.
A chemical change that gives off heat. Burning paper would be an example.
Because the potential chemical energy of the product is much less than the potential chemical energy of the reactants. Since energy is indestructible, it is converted to heat and light.
A chemical reaction that produces energy is said to be exothermic. In comparison, if it consumes energy it is endothermic.
Exothermic reaction gives free heat (energy).
When a chemical reaction takes in more energy than it gives off, it becomes an endothermic reaction. In an endothermic reaction, energy is absorbed from the surroundings in the form of heat.
Exothermic reaction gives free heat (energy).
An endothermic reaction is one that consumes heat.
All chemical reactions that release energy in the form of heat are called exothermic reactions.
Activation energy is needed to start a chemical reaction. This energy is used to join the reactants together or break them apart. If a reaction is exothermic then it gives energy out. If it is endo thermic then the reaction takes energy in.
An exothermic reaction is a chemical reaction that is done by the release of heat. It gives out energy to its surroundings. The energy needed for the reaction to occur is less than the total energy released.
An Endothermic reaction. If you touch the reaction vessel it will feel cool/cold, as it is taking in heat energy. By contract an Exothermic reaction is one that gives out heat. If you touch the reaction vessel it will feel warm/hot as it is liberating heat energy.
Fire The wood is a chemical energy and the fire (gasoline) is a chemical energy the heat from the fire obviously gives off heat and the "crackles" you hear gives off sound energy and the flame gives off light energy
During photosynthesis, no chemical reaction gives off heat. Photosynthesis is an endothermic process, meaning it requires energy in the form of sunlight to convert carbon dioxide and water into glucose and oxygen.
A chemical change that gives off heat. Burning paper would be an example.