exothermic: endothermic:
making ice cubesmelting ice cubesformation of snow in cloudsconversion of frost to water vaporcondensation of rain from water vaporevaporation of watera candle flameforming a cation from an atom in the gas phasemixing sodium sulfite and bleachbaking breadrusting ironcooking an eggburning sugarproducing sugar by photosynthesisforming ion pairsseparating ion pairsCombining atoms to make a molecule in the gas phasesplitting a gas molecule apartmixing water and strong acidsmixing water and ammonium nitratemixing water with an anhydrous saltmaking an anhydrous salt from a hydratecrystallizing liquid salts (as in sodium acetate in chemical handwarmers)melting solid saltsnuclear fissionreaction of barium hydroxide octahydrate crystals with dry ammonium chloridemixing water with calcium chloride
An exothermic change is any change that gives off energy in the process most likely thermal energy. Combustion is a chemical change that releases energy in the form of heat and light. Condensation is the change of state from a gas to a liquid. In the process of condensation the rapidly moving gas molecules loose enough energy to slow them down so much that they change into much slower liquid molecules. In this process the gas loses energy or gives it off so it is also an exothermic change. Lastly another simple example of an exothermic change is the hardening of concrete. It is similar to the above stage of condensation but it begins as a liquid and give off so much energy that its particles become set in a fixed pattern (otherwise known as a crystalline solid) and become, packed together very tightly. Concrete also has a set melting point (also supporting the fact concrete is a crystalline solid), it does not become softer as the temperature rises (like amorphous solids do: butter, plastic, glass, and more).
A firework exploding, because it gives off heat as a source of energy so that it can errupt into the air.
in order for an exothermic reaction to take place, it must expel (release) energy, for example;
burning wood
freezing water
turning on a flashlight
Respiration (glucose + oxygen ---> energy + carbon dioxide + heat); combustion of fuels; and neutralization reactions between acids and alkali's.
Mixing ethanol with water is an exothermic process.
When something lights on fire.
It depends on the situation. Suppose the stone is placed in a cup of hot water. It is now endothermic because it absorbs some of the heat. But if it is placed in a cup of frigid water, it is exothermic because it will release some of its heat as it drops in temperature. --------------------------------------------------------------- Endothermic or exothermic are terms used for processes, phenomenons, reactions not for materials.
Burning wood is exothermic and photosynthesis is endothermic.
No. For example ammonium nitrate spontaneously dissolves in water. This is an endothermic process.
Exothermic reactions give out heat. some examples of exothermic reactions are : 1)burning fuel in a fire 2)the addition of acid to water 3)the thermite reaction(this one is quite a sight) 4)the haber process of producing ammonia Endothermic reactions take in heat from their environment. some examples of endothermic reactions are: 1)an ice cube melting 2)depressurising a can(responsible in part why deodorant feels cold) 3)dissolving ammonium nitrate in water 4)decomposition of mercury (II) oxide(this requires a lot of heat)
Compounds are not generally considered endothermic or exothermic. These terms refer to processes. So, the process of formation, or the process of decomposition, would be an endothermic process or an exothermic process.
It can be either. Some exothermic processes, such as combustion, are chemical changes while others, such as condensation, are physical.
It is exothermic because the gas is expanding. Most processes that have to do with expansion are exothermic/
Exothermic. All living things are exothermic due to processes of metabolism.
Burning wood in a fire is exothermic. It gives off heat to the surroundings. In fact any reaction that gives off heat to the surroundings is exothermic.
No. Exothermic processes give off heat, to boil milk you have to put in heat.
The process is called metabolism. The mitochrondria function as energy breakdown organelles in the cell. The term for aerobic metabolism is cellular respiration.
It's a exothermic reaction because heat and light is being released.
exothermic and endothermic
Dissolving magnesium chloride & calcium chloride in water is exothermic reaction
It depends on the situation. Suppose the stone is placed in a cup of hot water. It is now endothermic because it absorbs some of the heat. But if it is placed in a cup of frigid water, it is exothermic because it will release some of its heat as it drops in temperature. --------------------------------------------------------------- Endothermic or exothermic are terms used for processes, phenomenons, reactions not for materials.
Burning wood is exothermic and photosynthesis is endothermic.
electrolysis, burning/combustion, photosynthesis. sorry that's the processes i am sure of. (we were still discussing about this in class)