energetics Flashcards
1
Q
exothermic
A
A reactuib that gives out energy. The surroundings increase in temperature.
2
Q
Endothermic
A
A reaction that absorbs energy. The surroundings decrease in temperature.
3
Q
Law of conservation
A
Energy cannot be created or destroyed
4
Q
System
A
Transfers energy to and from its’ surroundings. The chemical particles involved in the reaction
5
Q
Surroundings
A
Everything else in the local area
6
Q
Enthalpy
A
Chemical energy that can be transferred as heat
7
Q
Activation energy
A
Minimum energy required to start a reaction by breaking the initial bonds
8
Q
Bond breaking
A
Endothermic - Energy required to break bonds
9
Q
Bond-making
A
Exothermic - Energy is released to make bonds
10
Q
What decides if a reaction is endo or exothermic
A
The sum of all bonds broken OR the sum of all bonds made
