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What is a physical change?

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by

Julie Frace

on 2 July 2015

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Transcript of What is a physical change?

What is physical change?
Physical change is change in appearance. Physical change does not involve chemical change. An example of physical change is a solid turning into a liquid or a gas. It is Reversable.
What is chemical change?
Chemical change is any chage that results in the new formation of a substance. One example of chemical change is iron turning into rust. It is not reversable.
Who discovered physical and chemical change?

What are some signs of physical and chemical change?
Physical change 1: change in shape or size
Physical change 2: dissolving
Physical change 3: change of phase
Chemical change 1: Burning
Chemical change 2: temperature change without cooling or heating
Chemical change 3: bubbles
Chemical change 4: color change
Chemical change 5: Forms a precipitate
Sites used:
1: http://www.aps.org/programs/outreach/history/historicsites/gibbs.cfm
2: https://quizlet.com/18543770/indicators-of-physical-and-chemical-change-flash-cards/
3: http://www.mcwdn.org/chemist/pcchange.html
Can physical and chemical change happen at the same time?
Yes, Physical and chemical change can happen at the same time. It can happen one example is eating chocolate. as you digest it the chocolate changes into something else.
Physical And Chemical Change
By: Julia Frace

Physical and chemical change was discovered by Josiah Willard Gibbs. It was Discovered During the years from 1876 to 1878. Josiah Willard Gibbs was born February 11, 1839 in New Haven, Connecticut. He graduated from Yale (College) in 1858 and continued his career at Yale, earning his doctorate of philosophy in 1863.
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