week 5-6 Question 7

[Aminta Chem]

How do fine delta H and delta S I know the equations, just don't know how to use the table and the numbers to find them. Can someone give me an example of how one of them is solve? Thank you

[Vyas_Koduvayur_2B]

For delta H, we are told it is heated at 550 W for 3.09 mins. A watt is 1 joule per second, so calculate the total energy used by multiplying 550 by how many ever seconds are in 3.09 min. The difference in mass between initial mass and final mass is the amount that got vaporized, so now you have the amount of energy used to vaporize a certain amount in mass. Just convert this go kJ/mol now, and that is your enthalpy of vaporization.

Now for entropy, it is just delta H divided by boiling point.