00:01
So for this question, you're given values for the change in free energy and asked to determine, for the first question, if it's exodonic or enderjonic, and for the second question, if it's spontaneous or non -spontaneous.
00:14
So for the first part, we're told the free energy is negative 14 kilocalories.
00:23
So this negative number immediately tells us that it is an exorjonic reaction.
00:36
So it means that the free energy is being released by the system, right? i always think of exoronic as exiting the system.
00:46
So with a negative, it means there's excess energy, and so the energy is exiting the system.
00:54
If you think about it when the reactants are turning into the products, if the change in energy is negative, that means that the reactants has more energy than it is needed to turn from the reactants to the products.
01:13
So we have this extra energy that is not needed to perform the reaction.
01:19
And so this extra energy is released by the system and it exits the system.
01:26
So if you have that negative number, we know that it is exorgeny.
01:31
So for the next question, we're told the free energy is negative 31 kilocalories.
01:39
So again, this negative number tells us that it is going to be a spontaneous reaction.
01:53
Right...