00:02
Hi there.
00:03
In this question, we have some questions about energy and thermochemistry.
00:10
Let's see if we can fill in the blanks here.
00:12
So our first one says, actually the whole thing is number one.
00:17
Our first one is letter a.
00:19
Letter a says blank is the capacity to do work or to supply heat.
00:25
Well, that is the way that we define energy.
00:29
Energy is defined as that ability or capacity to do work or to supply heat to things.
00:36
All right.
00:38
Letter b asks about stored energy within a substance due to its chemical composition.
00:46
All right.
00:47
So due to its chemical composition, it's going to be potential energy because it's stored energy.
00:52
If it's due to its chemical composition, it's going to be chemical potential energy.
01:08
All right.
01:09
And sometimes this is shortened to either chemical energy or simply potential energy.
01:13
But its whole phrase would be chemical potential energy.
01:17
That's the stored energy due to a chemical composition, the bonds that make up that compound.
01:24
All right, let's go to letter c.
01:26
A reaction that absorbs energy is called a blank reaction.
01:30
Well, here we have two terms to consider.
01:34
One is endothermic, and a very similar one is exothermic.
01:44
In these, we see the prefix endo, which means into, an exo, which means out of.
01:50
So an endothermic reaction takes in or absorbs energy, while an exothermic one releases energy...