Physical Vs Chemical Changes Notes Flashcards
1
Q
Chemical property
A
A substances ability to react with anther substance to crate a new product
2
Q
Chemical change
A
A change in the nature of the starting materials undergoing a chemical reaction to produce one or more new substances or products.
Usually the products is difficult to reverse
3
Q
Reactant
A
Starting material in chemical reaction
4
Q
Product
A
Stuff that is made in a chemical reaction
Must draw an arrow, no equal signs allowed
5
Q
Signs of chemical change
A
• Temperature change: release energy-heat, light fire
Absorb heat energy- turns cold
• colour change
• odour produced?
• solid produced- precipitate
• new substance produced- if this does not happen, a change hasn’t occurred
• gas/bubbles
