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Chemical change
Consider air is Oxygen.CH$ is burnt.Products are water and CO2
Gas formation refers to the release of gas molecules during a chemical reaction. This can result in the production of bubbles or expansion of a substance. Gas formation is a common phenomenon in many chemical reactions and can be used to indicate the presence of certain reactants or products.
Evidence of a chemical reaction include the following: formation of a precipitate formation of a gas change in temperature change in color
The signs of a chemical reaction include change in temperature, change in color, formation of gas, formation of a precipitate, disappearance of a solid, formation of a new odor.
The formation of gas is:- a chemical process if the gas is the product of a chemical reaction- a physical process if the gas is the product of a change of phase as sublimation and vaporization
change in color, formation of gas and precipitate ;))
The formation of gas indicates a chemical reaction producing a gas as a product. Precipitate formation shows the formation of a solid substance from a chemical reaction. Release of heat indicates an exothermic reaction, which releases energy in the form of heat. A color change is indicative of a chemical change where the substances involved absorb or emit light in different parts of the spectrum.
The creation of bubbles in a liquid can result from:Boiling (formation of gas phase material) a physical changeDissolution of dissolved gasses (a physical change) from a liquid as it warmsThe creation of gases by reactants in an aqueous environment (chemical change)
a colour change, a gas produced or a precipitate (new substance/solid) formed.
There are many observable characteristics of a chemical reaction. They are: change in temperature formation of a precipitate change in color formation of a gas formation of a new odor disappearance of a solid
Signs that a chemical change has taken place include the formation of a gas, the formation of a precipitate, a change in temperature, and a change in color.