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Forestman
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Why do some chemical reactions release energy, while other chemical reactions absorb energy?
russ_watters said:It has been a while since I had chemistry, but I believe all chemical reactions can be either exothermic or endothermic depending on which direction it is run (ie, they are reversible). For example, this common reaction:
H2O + E <=> H2 + O2
Notice the symbol in the middle, which has arrows pointing in both directions, indictating the reaction can be run in either direction.
The premise of the question would therefore seem to be incorrect...
Energy released in chemical reactions refers to the energy that is released or given off when a chemical reaction takes place. This energy is usually in the form of heat or light.
Energy is released in chemical reactions through a process called exothermic reaction. This means that the energy stored in the chemical bonds of the reactants is greater than the energy stored in the chemical bonds of the products. The excess energy is then released in the form of heat or light.
Some common examples of energy released in chemical reactions include combustion reactions (such as burning wood), cellular respiration (the process by which our bodies convert food into energy), and the reaction between baking soda and vinegar to produce carbon dioxide gas.
Yes, energy released in chemical reactions can be harnessed and used to perform various tasks. For example, the heat and light energy released in combustion reactions can be used to cook food and provide light. Additionally, the energy released in cellular respiration is used by our bodies to perform daily tasks.
The amount of energy released in a chemical reaction can be affected by various factors, including the types of reactants involved, the concentration and temperature of the reactants, and the presence of a catalyst. Additionally, the stability of the chemical bonds in the reactants and products can also impact the amount of energy released.