what is the difference between physical reaction and chemical reaction?
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Chemical changes and physical changes. Chemical changes happen when chemical reactions occur. They involve the formation of new chemical elements or compounds . ... In a physical change, a substance simply changes physical state , eg from a solid to a liquid.
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Which is an example of a chemical change? Ans: A chemical transition is the result of a chemical reaction, whereas a physical change is when the structure of matter changes, but not the chemical identity. Burning, cooking, rusting, and rotting are examples of chemical changes.
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Nuclear reactions involve changes to electrons, while chemical reactions involve changes to protons and neutrons. Only chemical reactions can be exothermic. Chemical reactions can result in new compounds, while nuclear reactions can result in new elements.
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Chemical reactions are really physical reactions at the atomic level. We have given them a unique name so chemists would have employment, but they are really physical reactions. At that level there is no distinction. The metal ions in a flame test are wafted away by air currents associated with the flame.
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In a chemical change, a new substance is made, like when you burn a candle. In a physical change, no new substance is made, like when water turns to ice.
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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.
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A physical reaction occurs when molecules undergo a molecular rearrangement to produce a physical change. The molecules are not chemically altered. ... So, the difference is that with a physical reaction, a chemical change in the molecule is not observed, but a physical change is observed.
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(1) Nuclear reactions involve a change in an atom's nucleus, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei. (2) Different isotopes of an element normally behave similarly in chemical reactions.
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What is the difference between physical and chemical balance? Chemical balance is more sensitive than physical balance. It can weight upto 4 places of decimals.
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A chemical reaction is a process in which some substances, called reactants, change into different substances, called products. During the reaction, chemical bonds break in the reactants and new chemical bonds form in the products.
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A change can't be both physical and chemical, but physical and chemical changes can occur simultaneously. This is what's happening with the burning candle: the wax is melting, which is a physical change, and it's combusting, which is a chemical change. ... There's no change in the chemical formula of the substance.
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Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.
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A chemical property describes the ability of a substance to undergo a specific chemical change. A chemical reaction is a process that occurs when one or more substances are changed into one or more new substances.
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A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. ... A chemical property describes the ability of a substance to undergo a specific chemical change. To identify a chemical property, we look for a chemical change.
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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. Examples of physical changes are boiling, melting, freezing, and shredding.
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Key Points. Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic.
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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.