Chemical Reactions 2_1

Question	Answer
When is a new substance always formed?	In a Chemical Reaction.
Are Chemical Changes reversible or irreversible?	Irreversible
How can you tell that a Chemical reaction has occurred?	There is a: Colour Change A gas is given off Most involve a Energy Change
In a displacement Reaction if there is a big difference between the reactivity of the two metals, what will happen to the temperature?	There will be a temperature increase than if the metals are similar in their reactivity.
What will happen to the temperature if there is no chemical reaction?	There will be no temperature increase.

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	Created by Rachel Brown about 9 years ago

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