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Molar heat of combustion vs. Molecular weight. (2 Viewers)
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RaymondAllotta
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- Apr 27, 2006
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- HSC
- 2007
no they wernt allready on the x axis - u would have been expected to write them next to the "Molecular Weight" Title - and they were g/mol.
In the little table they had at the top of the page where the values of the molar heat of combusion were given for the other alkanols they also listed the name of the unit for molecular weight, so i dont see how anyone could have not known.
In the little table they had at the top of the page where the values of the molar heat of combusion were given for the other alkanols they also listed the name of the unit for molecular weight, so i dont see how anyone could have not known.
Kmara2nv
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- Nov 26, 2006
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- 2007
LMAOOOOOO i was doing a line of best fit and it lookd fkd so i done a column graph for the fuck of it lollll still showd the difference in the wiehgt and shit but comlumn graph lolllllll oh wellll only worth 3 marks shuld still get marks for the right increments and shit
angelbird72
New Member
I had gmol^-1 and 1350 for propan-1-ol and used incomplete combustion because of lack of oxygen as my reason.
I found that my graph worked out as a straight line through all of my points, and I started at meth.
The only problem with mine there, I think, is that instead of using 200 increments up the y axis like a normal person, I used increments of 180. It still worked and all, it's just that I know that when they mark they have a clear sheet that they lay over your graph and mark according to whether it matches. So mine would be different to everyone elses scale-wise, and I'm hoping it's clear how I did it.
It annoys me because a lot of times I do things like that that seem obvious to me, and then I get my test back and I have to go to the teacher and explain how I did it to get the marks I deserve, and you can't do that with this test.
And scabbing marks is one of my most valuable talents!
I found that my graph worked out as a straight line through all of my points, and I started at meth.
The only problem with mine there, I think, is that instead of using 200 increments up the y axis like a normal person, I used increments of 180. It still worked and all, it's just that I know that when they mark they have a clear sheet that they lay over your graph and mark according to whether it matches. So mine would be different to everyone elses scale-wise, and I'm hoping it's clear how I did it.
It annoys me because a lot of times I do things like that that seem obvious to me, and then I get my test back and I have to go to the teacher and explain how I did it to get the marks I deserve, and you can't do that with this test.
And scabbing marks is one of my most valuable talents!
philipadams123
New Member
- Joined
- May 27, 2007
- Messages
- 11
- Gender
- Male
- HSC
- 2007
i thot that incomplete combustion would be incorrect, as the lab vlaues incorporate incomplete combustion into their energy values, as even the incomplete combustion cycle produces energy, and all alkanols burn with a certain percentile incompletion. so i was stumped so i said energy was absorbed by the beaker as it entered the water :S