chemical changes Flashcards
understand chemical changes
1
Q
does the mass of the atoms change in a chemical reaction?
A
no
2
Q
what are broken and made during a reaction?
A
bonds
3
Q
is bonds breaking endothermic or exothermic?
A
endothermic
4
Q
is bonds being created endothermic or exothermic?
A
exothermic
5
Q
chemical reactions involve a change of _______?
A
energy
6
Q
combustion is defined as….?
A
a fuel reacting w/ oxygen to release energy
7
Q
hydrocarbons contain only…?
A
hydrogen and carbon
8
Q
what 3 things are needed for combustion?
A
fuel, heating & oxygen
9
Q
oxidation is ….?
A
the gain of oxygen
10
Q
A
11
Q
A
12
Q
A
13
Q
A
14
Q
A
15
Q
A
16
Q
A
17
Q
A
18
Q
A
