what are the signs of physical and chemical change when heat is applied?
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Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.
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Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. ... This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.
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In other words, heat can be thought of as a product. Again, changes in temperature can be thought of as changes in the concentration of heat. If the temperature of an exothermic reaction is increased, the reaction will shift LEFT. If the temperature of an exothermic reaction is decreased, the reaction will shift RIGHT.
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As the names suggest, a physical change affects a substance's physical properties, and a chemical change affects its chemical properties. Many physical changes are reversible (such as heating and cooling), whereas chemical changes are often irreversible or only reversible with an additional chemical change.
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physical and chemical properties. Examples of physical properties are: color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction (paramagnetic) or repulsion (diamagnetic) to magnets, opacity, viscosity and density. There are many more examples.
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['a raised temperature.', 'loss of appetite.', 'muscle aches.', 'headaches.']
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Chemical reactions are also known as chemical changes. There are many different ways to spot a chemical change. Five different signs include odor, temperature change, precipitate formation, production of gas bubbles, and a color change.
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In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.
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Some of these characteristics, such as a change in color, are visual. You can tell others by smell or by simple measurements, such as changes in odor or temperature. However, only a detailed chemical analysis can confirm for certain that a reaction has occurred.
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The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.
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Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. ... The only way to reverse a chemical change is via another chemical reaction.
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['An increase in the frequency and intensity of felt earthquakes.', 'Noticeable steaming or fumarolic activity and new or enlarged areas of hot ground.', 'Subtle swelling of the ground surface.', 'Small changes in heat flow.', 'Changes in the composition or relative abundances of fumarolic gases.']
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Both temperature and pressure can be measured, and state changes can be observed. When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation).
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Signs of a physical change include: Expected color change. Change in size or shape. Change in state of matter.
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Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density. An example of a physical change is the process of tempering steel to form a knife blade.
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A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. ... The only way to reverse a chemical change is via another chemical reaction.
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Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.