0
so the reaction can get started
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoYes
Add your answer:
Earn +20 pts
What is the formula used to calculate thermal energy changes?
Simply use conservation of energy. The change in an object's thermal energy is equal to any heat (thermal) energy that gets into the object, minus any heat energy that gets out of the object. If you have energy conversion, such as chemical reactions, you need to account for the increase or reduction of heat energy due to those reactions, as well.
Do radios need energy?
Yes, Radios Need Energy. ( All Electronics Need Energy )
Why do you need chemical energy to produce kinetic energy?
There are many ways to convert one form of energy into another form. We do have to start with energy (or in the case of an atomic bomb, mass-energy) in order to make another form of energy because it is impossible to make energy out of nothing (as stated in the law of conservation of mass-energy). Since the human body runs on chemical energy, we do use some degree of chemical energy in everything we do - even thinking requires it, not just the movement of muscles. If I cut a rope that is holding up a weight, which then falls, I would then be converting gravitational potential energy to kinetic energy - although even then, some chemical energy would also be involved in moving my hand in order to cut the rope.
Why you need energy when you sleep?
Because you move a lot when you sleep, To move you need energy so you need energy to sleep.
What are the substances in food that give you energy called?
liquid
Why does an exothermic reaction need activeation energy?
Exothermic reactions need activation energy to start, but they also need it to keep going to build up heat. At the end of the reaction, the products have less energy than the reactants. This produces heat. In order for this to happen, the exothermic reaction needs activation energy.
What kind of reaction is once started will continue by itself?
No. It requires an energy input (the activation energy) before it can proceed. For some reactions the energy needed can be as low as simply heat from the room and others need thousands of Watts of electrical power.
How does the body get energy?
exothermic reactions provide us with the energy we need to carry out daily activities
Why do living things need both endothermic and exothermic reactions in their bodies?
Living things have cellular reactions which involve both reactions in the process. Endothermic reactions help the body conserve energy or contain it. Exothermic reactions help the body produce energy.
Endothermic and exothermic reaction?
An exothermic reaction releases energy, usually to the surroundings. There is a net loss of energy from the reactants. However, exothermic reactions also need a little energy to get started, but this is less than the eventual amount given out. An endothermic reaction takes in energy, also usually from the surroundings. There is a net gain of energy into the reactions. Again, a little energy is lost, but this is hardly anything compared to the amount taken in.
What is the role of energy in chemical reations?
All chemical reactions need a certain amount of activation energy to get started.
How does enzymes speed up chemical reactions in your body?
Reactions in the body need a certain amount of energy, called activation energy. Most reactions don't take place because this activation energy is too high. The enzyme bonds to the molecule which diminguishes the activation energy, so the reaction can take place. These enzymes de-bond from the new formed molecule afterwards.
Why do all enzymatic reactions need activation energy?
because chemical reactions cannot react spontaneously
Have you ever wondered how energy participates in chemical reactions?
I wonder about a lot of things, yes.
Catalysts speed up chemical reactions by?
Catalysts are very effective and economical in industrial area. Catalysts increase the rate of a reaction by reducing the activation energy of the reaction. activation energy is the overall energy needed for a reaction to initiate. Both reactions such as exothermic or endothermic has activation energy, so we need to overcome the activation energy for the reaction to proceed. Actually the way it works is quiet simple, it absorbs the reactant particles on its surface reducing their bond energy. When the energy between bonds is weaker, its easier for reactant particle to change to products. Activation energy comes from when reactant particles collide with each other with high kinetic energy.
How do endothermic and exothermic differ?
Exothermic reactions release energy (usually as heat) into the surrounding environment - endothermic reactions absorb energy from the surrounding environment. Note that exothermic reactions are capable of turning into runaway reactions as the heat of reaction often speeds up the rate of reaction (releasing more heat, etc). Endothermic reactions are, usually, self moderating as a limited amount of energy is capable of being drawn from the surrounding environment.
Why is the activation energy of an endothermic reaction is at least as large as its enthalpy?
In an endothermic reaction the energy of the products is higher than the energy of the reactants. The activation energy also is an energy increase. The activation energy must be at least as high as the products energy or the reaction would never take place. Thus, the activation energy must be at least as large as the enthalpy in an endothermic reaction.
