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for every reaction there is a minimal amount of energy required. sometimes this amount of energy is provided by the environment and sometimes not. when the energy is not provided by the environment heating is required. all of this is a result of the collisions of atoms .they need energy to form products with other atoms. this energy is obtained from the environment
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∙ 12y ago
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∙ 14y agoNo idea but I need to answer this question for homework and I don't know the answer. :-( this Question is crap !!!
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Is energy always involved in making or breaking chemical bonds?
no, some reactions are spontenous.
What results in a chemical change?
Chemical changes occur when a substance combines with another to form a new substance, called synthesis or, alternatively, decomposes into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. Some reactions produce heat and are called exothermicreactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. Understanding chemical changes is a major part of the science ofchemistry. When chemical reactions occur, the atoms are rearranged and the reaction is accompanied by an energy change as new products are generated. An example of a chemical change is the reaction between sodium and water to produce sodium hydroxide and hydrogen. So much energy is released that the hydrogen gas released spontaneously burns in the air.
Are chemical reactions useful?
yes some chemical reactions are harmful to us. as digestion of food, photosynthesis, decomposition of organic waste are some examples of the useful chemical reactions.
How does temperature affect the rate of reaction?
Higher temperature increases rateFor the very large majority of chemical reactions, increasing the temperature increases the rate of the reaction. This is because nearly all chemical reactions have some activation barrier which must be surmounted before the reaction can proceed, and the added temperature helps to get over this barrier. There are however some processes which do not speed up with increased temperature, although there much fewer. The freezing of water is one obvious example.AnswerHeating chemical substances can make the molecules separate and move around faster. This can increase the speed with which they mix with surrounding molecules from other chemical substances, thus speeding up a reaction. This is not always the case, some chemicals will only react when cold...While it is true that hotter molecules move faster, it is not the improved mixing that makes reactions occur faster -- otherwise you could just stir more effectively and not have to heat! Heating gives the molecules more energy to surmount the activation energy barrier of the reaction. The more energy the reactants have, the more of them can surmount this barrier, which is required for the reaction to occur. The reason some reactions don't go faster when heated is because they do be activationless or the barrier may be so high that other methods are necessary to give the reactant sufficient energy to surmount the barrier.See the Related Question below for more information.
How does an enzyme influence a biological reaction?
All reactions, even exergonic, need an activation energy to happen. Enzymes provide that activation energy. Sometimes by their R groups, sometimes by stressing bonds in a molecule in their activation site and sometimes by only providing a space apart from the cytosol in their activation site for two substrates to react.
All reactions require activation energy?
No. Some reactions such as one material dissolving into another do not require a starting energy.
Why do some reactions require from their surrounding?
for every reaction there is a minimal amount of energy required. sometimes this amount of energy is provided by the environment and sometimes not. when the energy is not provided by the environment heating is required. all of this is a result of the collisions of atoms .they need energy to form products with other atoms. this energy is obtained from the environment
What type of reaction releases energy and does not require initial energy to occur?
All reactions require an activation energy. Some appear not to because that energy is provided enough by their temperature. Thus, there is no reaction that does not require any initial energy to occur. A reaction that results in an overall release of energy is called an exothermic reaction.
What materials will rust?
Rust is the result of a metal reacting with oxygen in a moist environment in a redox reaction. Some of these redox reactions happen spontaneously, others need some extra energy. The reactions that don't require additional energy will happen on their own.
What is the relationship between the temperature and the rate of chemical?
Heat energy is necessary for some chemical reactions to occur. Some chemical reactions are endothermic meaning they require or absorb energy for a chemical reaction to occur. Other chemical reaction are exothermic meaning they release energy when the chemical reaction takes place..
Do all reactions release energy?
Some might release energy . However, For ALL reactions there is a CHANGE in energy.
Why is energy necessary to chemical reactions and describe some common sources of energy.?
Explain why energy is necessary to chemical reactions, and describe some common sources of energy.
Why energy is necessary to chemical reactions and describe some common sources of energy.?
Explain why energy is necessary to chemical reactions, and describe some common sources of energy.
What describes the role of sunlight in chemical reactions?
it provides energy for some reactions to take place.
What is an example of a chemical reaction that releases energy?
A chemical reaction that releases energy is called an exothermic reaction.
Explain in general terms how redox reactions are involved in energy exchanges?
Redox reactions are involved in energy exchanges because the relocation of electrons releases some of the energy stored in organic molecules.
What are some things that need energy?
Candle and all Chemical reactions
