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electrons are always involved in chemical reactions. how they are positioned which atom they are located if they are sharing paired unpaired etc.
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∙ 14y ago
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Why do chemical reactions always involve a change in energy?
Chemical bonds always break in chemical reactions, causing changes in energy.
Why do we say that chemical reactions always involve changes in energy?
Because they do. In fact, you can't get ANYTHING done without some energy changes involved.
Chemical reactions always involve changes in a chemical?
There will always be changes in one of the reactants. In some chemical reactions, one of the chemicals works as a catalyst to encourage a reaction between two or more chemicals but does not change during the reaction.
What is always a characteristic of a chemical change but not always a characteristic of a physical change?
When a chemical change takes place, the chemical structure of particles involved changes (i.e. one or more new substances are formed). In a physical change, the physical state of the particles involved changes (e.g. a solid melts and becomes a liquid). The chemical structure of the particles does not change, and no new substance is formed.
What two kinds of energy changes can take place during a chemical reaction?
Two types of energy changes that can occur in a chemical reaction are (1) endothermic and (2) exothermic. Endothermic is where energy is added to the system and exothermic is where energy is given off by the system.
Why do chemical reactions always involve a chemical change?
Chemical bonds always break in chemical reactions, causing changes in energy.
Why do chemical reactions always involve a change in energy?
Chemical bonds always break in chemical reactions, causing changes in energy.
Why do we say that chemical reactions always involve changes in energy?
Because they do. In fact, you can't get ANYTHING done without some energy changes involved.
Why do reactions always involve a change in energy?
Chemical bonds always break in chemical reactions, causing changes in energy.
Do chemical reactions always involve changes in energy?
no
Chemical Reactions always involved changes in chemical?
Yes. The chemicals (reactants) that undergo a chemical reaction react with each other and make new chemicals called the products.
Chemical reactions always involve changes in a chemical?
There will always be changes in one of the reactants. In some chemical reactions, one of the chemicals works as a catalyst to encourage a reaction between two or more chemicals but does not change during the reaction.
Is energy always involved in physical or chemical changes?
Yes
Is energy always involved in making or breaking chemical bonds?
no, some reactions are spontenous.
What is always involved when physical or chemical changes occur in matter?
Energy is ALWAYS invoved.
Is energy involved in all changes?
yes all changes involve exchange in energy
When chemical reactions occur energy is always absorbed?
No, chemical reactions can be endothermic or exothermic.
