0
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 else can I help you with?
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.
What is another name for light dependent reations of photosynthesis?
The exergonic reaction is a chemical reaction that releases energy (photosynthesis). The product of light dependant reactions is called endergonic reaction. It is a chemical reaction that requires energy.
Do all reactions release energy?
No, not all reactions release energy. Some reactions require an input of energy to proceed, and these are called endothermic reactions. Endothermic reactions absorb heat from the surroundings rather than releasing it.
Is it true or false that all chemical reactions require an initial input of energy called catalysis?
False. Not all chemical reactions require catalysis. Some reactions occur spontaneously, while others may require an initial input of energy in the form of activation energy. Catalysis is a process that lowers the activation energy required for a reaction to occur, but it is not necessary for all reactions.
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
All reactions require activation energy?
Yes, all chemical reactions require an initial input of energy, called activation energy, to start. This energy is needed to break the existing bonds in the reactant molecules and allow new bonds to form to produce the products. Once this energy barrier is overcome, the reaction can proceed on its own.
Why do some chemical reactions release heat while others absorb heat?
Chemical reactions release or absorb heat based on whether they release or require energy to break or form bonds between atoms. Reactions that release heat are exothermic, as they release energy, while reactions that absorb heat are endothermic, as they require energy input.
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.
Do decomposition reactions require energy?
Decomposition reactions usually release energy, as they involve breaking down a compound into simpler substances. This energy release can be in the form of heat, light, or sound. However, some decomposition reactions may require activation energy to start the process.
Do dehydration reactions require ATP?
Dehydration reactions typically do not require ATP because they involve the removal of water molecules to form new bonds. However, some dehydration reactions that involve the synthesis of complex molecules may require ATP as an energy source for the process.
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.
Can a reaction use more energy than it gives off?
Yes. Such a reaction is called an endothermicreaction.
Do all chemical reactions need heat to start them off?
No, not all chemical reactions require heat to start. Some reactions can occur at room temperature or even at low temperatures. Heat is often used to speed up reactions or provide enough energy to overcome the activation energy barrier.
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..
