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Leviafan [203]
3 years ago
11

A friend tells you, because composition does not change during a physical changes, the appearance of a substance does not change

. is your friend correct? explain why.
Chemistry
1 answer:
Travka [436]3 years ago
3 0
That friend is not correct. Physical change is characterized by a change in appearance without any change in composition. So, if the appearance did not change in the situation, then there is no change in the system. This type of change affects the form of a substance but not the composition or the structure of the molecules. Examples of this type of change are ice melting, cutting a paper into half, clay is molded to a new shape, butter melting, water evaporating. The change that involves a change in chemical composition is classified a chemical change. In this type of change, chemical reactions would take place.
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avanturin [10]

Answer:

Reaction type: Single displacement

Reactant: Magnesium

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6 0
3 years ago
How will temperature affect the spontaneity of a reaction with positive H and S?
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Answer:

D.A high temperature will make it spontaneous.

Explanation:

we know that

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T =   Δ H / Δ S

At temperature above this T , Δ G becomes negative if Δ S and ΔH are  positive .

So at a  high temperature will make it spontaneous.

5 0
3 years ago
Which of the following waves are mechanical waves? (More than one choice may be correct.)
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Which energy transformation produces electricity and is least likely to negatively impact the environment?
Anastasy [175]

<em>Hello!</em>

<h3><em /></h3><h3><u><em>The answer to this question is</em></u>: D) Generating electricity from a solar panel system.</h3><h3 />

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8 0
2 years ago
Energy changes WITHIN an energy type is called what?
Airida [17]

Answer:

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Explanation:

8 0
2 years ago
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