00:01
Vertical yield or the theoretical melting point that is 77 plus 83 divided by 2 that would be 80 degrees celsius.
00:10
So this would be our actual melting point that is 80 degrees celsius.
00:15
Now we need to get the percent error.
00:17
To get the percent error, we have the theoretical mp minus the actual mp times 100 divided by the actual mp.
00:27
And basically the percent error of naphthalene is 0%.
00:32
Second one, the difference in melting point means basically impurity.
00:39
So that would be impurity in sample.
00:45
When a sample became old, it will decompose us and hence showing difference in melting point.
00:52
It impure sample difference in temperature may go beyond 5 degrees celsius, but in this case, the percent error is 0.
01:00
0 % hence it will be okay to use.
01:03
Now for this part for number 3, take note that the temperature at which a solid melt is known as the melting point or the mp of the substance.
01:16
The melting point is a physical property of a solid and can be used to help identify a substance.
01:24
Pure crystalline substances have a clear, sharply defined melting point.
01:30
During the melting point, during the melting, melting process all of the energy added to a substance is consumed as heat of fusion and the temperature remains constant...