what are chemical and physical changes
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Chemical & Physical Changes A physical change does not produce a new substance. Changes in state or phase (melting, freezing, vaporization, condensation, sublimation) are physical changes. Examples of physical changes include crushing a can, melting an ice cube, and breaking a bottle.
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Chemical & Physical Changes Chemical Changes. Chemical changes take place on the molecular level. A chemical change produces a new substance. Examples of chemical changes include combustion (burning), cooking an egg, rusting of an iron pan, and mixing hydrochloric acid and sodium hydroxide to make salt and water. Physical Changes. Physical changes are concerned with energy and states of matter.
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Enlisted Pay Officer Pay. Officer salaries are based on rank and years of service. The monthly pay for an Ensign (O-1) upon receiving commission is $2,934.30 plus allowances and benefits. This graph shows the monthly salary for typical Officers based on rank and years of service.fficer Pay. Officer salaries are based on rank and years of service. The monthly pay for an Ensign (O-1) upon receiving commission is $2,934.30 plus allowances and benefits. This graph shows the monthly salary for typical Officers based on rank and years of service.
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- A: Some examples of physical changes that commonly occur in everyday life include sugar dissolving in coffee or milk, water boiling, water freezing, ice melting and the chopping of vegetables. Physical changes do not alter the fundamental identity of a substance.
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What Are Examples of Everyday Physical Changes? A chemical change leads to the creation of a new product, while a physical change, often short-term and reversible, does not generate a new product. Water is one of the most commonly occurring molecules in nature. The transformations that water undergo from one state of matter into another are examples of physical changes. Dissolving salt into water is also a type of physical change.
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CONTENTS A physical change occurs when the substance. changes state but does not change its chemical. composition. ! For example: water freezing into ice, cutting a. piece of wood into smaller pieces, etc. The form. or appearance has changed, but the properties of. that substance are the same (i.e. it has the same. melting point, boiling point, chemical.
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supersede Definition of supersede for English Language Learners. : to take the place of (someone or something that is old, no longer useful, etc.) : to replace (someone or something)
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Chemical and Physical Changes 1 A chemical change is usually difficult to reverse. 2  A physical change does not involve the the formation of any new substances. 3  A physical change involves a change in the physical state or appearance of the substance. 4  A physical change is usually easy to reverse.
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- Chemical changes involve chemical reactions and the creation of new products. Typically, a chemical change is irreversible. In contrast, physical changes do not form new products and are reversible.This is a list of more than 10 examples of chemical changes. 1  rusting of iron. 2  combustion (burning) of wood. 3  metabolism of food in the body. 4  mixing an acid and a base, such as hydrochloric acid (HCl) and sodium hydroxide (NaOH). 5  cooking an egg.
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General Chemistry/Print version 1 For example: When water (H 2 O) changes from solid ice to liquid water, that is a physical change. 2  The chemical makeup (hydrogen and oxygen) is not altered. 3  When salt and sugar dissolve in water it is a physical change. 4  The chemical makeup of the salt and sugar are not changed.
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Problem 1.20 Which of these occurences are due to physical changes and which are due to chemical changes? During physical changes, a substance changes its physical appearance or state, but not its basic identity. In a chemical change, a substance is transformed into a chemically different substance. In case (a), we see that a chemical transformation has occurred: a combustion reaction has taken place.
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- a change in concentration only (such as adding more water to a black cup of coffee), a change in physical state only (such as melting a solid into a liquid, vaporizing a liquid into a gas, or dissolving a sample in a solvent). A chemical change (also referred to as a chemical reaction) does involve a change in the chemical composition, such as the rusting of iron (Fe changing to Fe 2 O 3). This may be accompanied by a change in physical state as well, and sometimes it is difficult to decide whether it is strictly a chemical or physical change.
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Translations for physical change Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds. Physical changes occur when objects or substances undergo a change that does not change their 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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Chemical & Physical Changes A chemical change produces a new substance. Another way to think of it is that a chemical change accompanies a chemical reaction. Examples of chemical changes include combustion (burning), cooking an egg, rusting of an iron pan, and mixing hydrochloric acid and sodium hydroxide to make salt and water. Physical changes are concerned with energy and states of matter.
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Translations for physical change A physical change involves a change in physical properties. 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.hysical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds. Physical changes occur when objects or substances undergo a change that does not change their chemical composition.
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Lab #8: Chemical and Physical Changes A gas that has carbon, (not every gas has carbon) Smoke. Is this a chemical or physical change: bread turns black after being in the toaster for too long. Chemical change (because of the color change and addition of heat) Is this a chemical or physical change: Water condenses on the outside of a glass of iced tea. Physical change (because we have the same substance and it only changes its appearance)
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Definition of a Chemical Change We describe and categorize different types of matter by referring to its physical or chemical properties. Physical properties are the traits of an object that can be readily seen such as size, color and state. Measuring or changing these properties does not affect the chemical nature of the matter. For example, a paper that is cut into small pieces has undergone a physical change. The pieces have a different quantity, size, shape and texture than the original sheet. Chemical properties are the characteristics that describe the composition of matter.
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Difference Between Physical and Chemical Change Another big difference between physical and chemical change is the speed of transformation. Physical change occurs faster and sometimes instantaneously. Most chemical changes, on the other hand, take longer time to become discernible. You can crumple a tin can and you will immediately see physical changes. But corrosion of tin can occurs very slowly; it will take a long time before you see the appearance of rust on the can. There is a wide difference between physical and chemical changes. With physical change, you are not transforming the original molecular composition of the substance. But with chemical change, the molecular structure is being transformed thus you will get a new substance.
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Physical and Chemical Changes Physical and Chemical Changes. There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed. For example, if a piece of paper is cut up into small pieces it still is paper. This would be a physical change in the shape and size of the paper.
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- 1 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.
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- A physical change, such as a state change or dissolving, does not create a new substance, but a chemical change does. In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products.
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General Chemistry/Print version 1 Physical changes only change the appearance of a substance, not its chemical composition. 2  Chemical changes cause a substance to change into an entirely substance with a new chemical formula.  Chemical changes are also known as chemical reactions.
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Physical and Chemical Properties of Matter Chemical Changes or Reactions: Chemical change results in one or more substances of entirely different composition from the original substances. The elements and/or compounds at the start of the reaction are rearranged into new product compounds or elements. A CHEMICAL CHANGE alters the composition of the original matter. Different elements or compounds are present at the end of the chemical change.
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The difference between property and change (as in physical property and change?) Please Help? a physical property is the freezing point of water is 0C a physical change is actual water freezing or ice melting a chemical property is that paper burns in the presence of oxygen and high enough temperatures, a chemical change is actual paper burning and producing ash and other by products.
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- Best Answer: Chemical. Physical changes are usually reversible and does not involve breaking / forming or bonds. Chemical changes, on the other hand, are usually irreversible and the breaking / forming of bonds do take place. Burning of paper produces ash, smoke and also releases heat.
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Physical and Chemical changes in matter Physical Change Chemical Change; No new or different substance is formed. The composition of the substance, that undergoes the change, remains unchanged: Results in the formation of at least one new substance. The constituent particles of the new substance are different from the constituent particles of the original substance
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Physical and Chemical changes in matter A change in which the composition of a substance is altered is called as chemical change of matter. As a result, the original properties get changed and one or more new substances are formed.