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Vikentia [17]
3 years ago
11

Are phase changes physical or chemical changes? why?

Chemistry
2 answers:
Studentka2010 [4]3 years ago
6 0
Physical! Because they do not modify the nature of the substance ( if you look at the chemical level) and it is reversible

Vapor is H20
Water is H20
Ice is H20

A chemical changes is not reversible
Burning wood for example! And the reactants interact together to form a new product.
Reptile [31]3 years ago
3 0
<h2>Answer:</h2>

Physical changes

<h2>Example:</h2>

You added enough energy to create a phase change from solid to liquid. Physical actions, such as changing temperature or pressure, can cause physical changes. No chemical changes took place when you melted the ice. The water molecules are still water molecules.

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Juli2301 [7.4K]

Explanation:

water evaporates because when h2o (water) particles heat up, they gain energy causing them to start to vibrate. this moves the oarticles further and further away from eachother and making the substance less dense, and turning it into a gas. meaning it has evaporated

5 0
1 year ago
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An airplane starts at rest and Excelerator down the runway for 20 seconds. At the end of the runway, its velocity is 80 m/s Nort
masha68 [24]
According to the formula you have given us to work with . . .

1). The airplane's acceleration is

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2).  For the cyclist:

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8 0
2 years ago
Balance chemical equation ClO2+H2O=HClO3+HCl
steposvetlana [31]

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6CIO2 + 3H2O = 5HCIO3 + HCI

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8 0
3 years ago
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larisa86 [58]
Packets of light energy are called photons. 
7 0
2 years ago
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