Question

Classify each of the following as a chemical change or a physical change.
Sugar dissolves in water.
A peach rots
Icicles melt in the warm sunlight.
A baking cake rises in the oven.

Answer 1

@Michele_Laino

Answer 2

Sugar dissolves in water, is a chemical change, since such change involves chemical properties of sugar

Answer 3

I thought it was physical

Answer 4

A peach rots, is a chemical change too, since such change is related to chemical trasformation into the peach, caused by its interaction, with the surrounding air

Answer 5

no, I think not, since the solutions, and mixtures, are studied by chemistry

Answer 6

a good general rule is:
if the change is about the inanimate matter, namely those changes are not related to the chemical structutre of that matter, then those changes are all physical changes, namely those changes are related to Physics

Answer 7

whereas, if those changes, are related to the variation of the chemical composition of the sample of matter, then those changes are all chemical changes

Answer 8

for example, the third question, namely:
Icicles melt in the warm sunlight, is a physical change, since it can be view as state change of water, from solid to liquid

Answer 9

well i was about to say for the third one =)

Answer 10

the fourth question, namely
A baking cake rises in the oven, is a physical change, since it is caused by the air contained into the cake, which is expanding, since the increasing of a temperature of a body, causes a dilation of that body. That change is not related to the chemical composition of our cake.

Answer 11

intermolecule and inTRAmolecule forces

Answer 12

The @Michele_Laino

Answer 13

The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

Answer 14

Thx I mean

Answer 15

Thanks!

Answer 16

=)