What is the difference between physical and chemical change?

2 answers:

8 0

A physical Change is when you change the form, but not the object. such as when you grind wood, you get wood chips. same thing different form. a chemical Change is When You change the substance by adding another substance

Vikki [24]3 years ago

6 0

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.

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2. A block of aluminum with a mass of 140g is cooled from 98.4oC to 62.2oC with a release of 1137J of heat. From these data, cal

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Q = M * C *ΔT

Q / ΔT = M

Δf - Δi = 98.4ºC - 62.2ºC = 36.2ºC

C = 1137 J / 140 * 36.2

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