【Daily Question】In-depth processing 20160818: Definition – What is a “physical change”?
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To boost popularity and enhance technical exchanges among sea enthusiasts, 【One Question per Day】 is launched. Participation earns 4 points of wealth! 10 wealth points as a reward for correct answers or in-depth discussions! :lol Definition of a noun: What is a “physical change”? Answer: A physical change refers to a change in which no new substances are formed. ==================================== ☛ The voting campaign “I’m saving energy; where are you?” in the Petrochemical Section has started: http://bbs.hcbbs.com/thread-1606794-1-1.html (Source: Haichuan Chemical Industry Forum) ☛ Results of the first round of selection for outstanding management members at Haichuan – results will be displayed for 10 days: http://bbs.hcbbs.com/thread-1609050-1-1.html (Source: Haichuan Chemical Industry Forum) ☛ Notice from the “Petrochemical Section” regarding the selection and rewards for outstanding moderators, technicians, and top members from January to July 2016: http://bbs.hcbbs.com/thread-1608031-1-1.html (Source: Haichuan Chemical Industry Forum)
A physical change, simply put, is a change in phase without any alteration in composition
No chemical reaction occurred, and the molecules of the substance did not change
Materials change from one state to another
Physical change, as opposed to chemical change. Such as changes in position and shape, emission of light, release of heat, and changes in phase. It involves no combination of elements, nor any reorganization of chemical bonds.
No qualitative change has occurred; only a change in state or phase has taken place
A light-emitting and heat-releasing phenomenon that does not produce new substances
There are no changes that result in the formation of new substances. (A physical change is merely a change in the appearance and state of a substance)
During the reaction process, there is no change in the substances.
A physical change refers to a situation in which the state of a substance changes, but generally the constituent components of the substance itself remain unchanged. For example: changes in position, volume, shape, temperature, and pressure, as well as the mutual transformation between gas, liquid, and solid states. There is also the interaction between matter and electromagnetic fields, the interaction between light and matter, as well as the interactions and transformations among microscopic particles (electrons, atomic nuclei, fundamental particles, etc.), all of which are physical changes
The state of the substance has changed, but its constituent components remain unchanged, and no other substances are formed.