Answer: An existing theory is modified so that it can explain both the old and new observations.
Explanation:
Answer:The name of the given molecule is 1-octene
1) We will number the carbon chain in such a way that so that smallest number should reside on the carbon atom with double bond. By numbering we the chain we can see that carbon with double are given with number '1'.
2) Now we will count the number of carbon atoms in a given chain. There are 8 carbon atoms present in the given molecule.
According to IUPAC naming of organic molecules :
1) First write the number on which double bond is present. Here is number '1' like this '1-'.
2) After this write the prefix which will tell us about the number of total carbon atoms present in the chain followed by suffix 'ene'(suffix used for hydrocarbon with one double bond). Here there are 8 carbon atoms and prefix for eight carbon atoms is 'octa'
So, the name of the given molecule is : 1-octene
I've never done a reaction that involved just bond enthalpies before, so this is just a guess.
It's still products - reactants. The problem is the C=O bond. Do you count it once or twice? I'm going to choose once, but don't be surprised if it is incorrect.
Sum of the products - Sum of the reactants.
ΔH = 799 - 494
ΔH = 305
And that would be your answer to three places.
Periodic trends illustrate how some elements are very reactive while others are stable.