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Do chemical reactions give out energy in the form of heat light or sound?
Yes, chemical reactions can give out energy in the form of heat, light, or sound. This energy is released due to the breaking and forming of chemical bonds during the reaction.
What are Reactions such as fire burning give off energy in a form of heat called?
Those reactions are said to be exothermic.
What is the opposite of exothermic?
The opposite of exothermic is endothermic. Exothermic reactions are those which give off energy in the form of heat. Endothermic reactions require energy.
What chemicals reactions give out heat?
Some examples of chemical reactions that give out heat are combustion reactions (e.g. burning of wood), oxidation reactions (e.g. rusting of iron), and neutralization reactions (e.g. mixing an acid and a base). These reactions release energy in the form of heat due to the rearrangement of atoms and the breaking and forming of chemical bonds.
Can a reaction use more energy than it gives off?
Yes. Such a reaction is called an endothermicreaction.
What are the exothermic and endothermic reactions and how can they be used?
exothermic reactions are those that give out energy (most notably by heat) when they occur endothermic reactions require energy to take place and thus feel cold to touch as they extract heat from the surrounding environment.
What are considered Favorable chemical reactions?
Favorable chemical reactions are those that release energy, produce a decrease in entropy, or result in the formation of more stable products. These reactions typically proceed in the direction of equilibrium and are thermodynamically spontaneous. Examples include combustion reactions and exothermic reactions.
Why are endothermic reactions rare?
Chemical reactions occur spontaneously when the free energy of the product is less than the free energy of the reactants. Free energy is a combination of thermal energy (heat) and entropy. If thermal energy is absorbed during a reaction, there must be an exceptionally large increase in entropy to give a net reduction in free energy.
What is the scientific name for reactions that give out energy?
The scientific name for the reaction that gives out energy is exothermic
What do chemical changes always take in or give off?
Some reactions give off heat (exothermic), others absorb heat (endothermic). All reactions increase entropy.
Do all chemical reactions need energy to start them off?
Some reactions are called endothermic ("into-energy") meaning that they require excess energy in order to react. This will cause the reaction to feel cold. Other rections are exothermic ("out-energy"), meaning that they give off heat. Reactions only occur when the environment around them contains enough energy (e.g. lighting a fire, cooking) to push them over what's called a reaction threshold. This is their "activation energy". It is different for every reaction. Many reactions that we call spontaneous are actually just reactions that have reached that threshold under normal conditions, which is 1 atmosphere of pressure and 75 degrees Fahrenheit. This is also called Standard Temperature and Pressure, or STP. If you lower the temperature or pressure, these reactions might stop or not occur at all. Other reactions occur at very low temperatures and pressures, and others occur at much higher ones. Every reaction has a temperature-pressure curve which shows under which conditions the reaction will occur. Lastly, there is an effect called catalysis. This uses a material, often a metal, to artifically lower the reaction energy for the components. This happens by bringing the reactants together on the surface of the metal, where they naturally combine. Using catalysis means having to put less energy into a system for the reaction to occur. Catalysts are reusable and do not become part of the products. A good example of catalytics occurs in your own body: enzymes are special strings of proteins which catalyze certain reactions, such as breaking down food or transferring nutrients into and waste out of cells. In some cases, enzymes cause reactions in your body which would otherwise go so slowly that there's no way you could stay alive!
What transfer of energy is and give an example?
Transfer of energy refers to the movement of energy from one system or object to another. This can occur in various forms such as heat, work, or electromagnetic radiation. An example of transfer of energy is when sunlight transfers energy to plants during photosynthesis.
Does energy conversions always give off heat?
No, not all energy conversions give off heat. Some energy conversions, such as nuclear reactions and chemical reactions, can produce other forms of energy like light or sound instead of heat.
Do chemical reactions give out energy in the form of heat light or sound?
Yes, chemical reactions can give out energy in the form of heat, light, or sound. This energy is released due to the breaking and forming of chemical bonds during the reaction.
Does endergonic give energy?
Endergonic reactions require energy input to proceed, as they involve the absorption of energy from the surroundings. The endergonic process stores this energy within the system for chemical reactions or other forms of energy utilization.
What are Reactions such as fire burning give off energy in a form of heat called?
Those reactions are said to be exothermic.
What does an energy diagram give?
It shows the energy requirements needed in order for a reaction to occur.
