a question on HSC 2007 paper (1 Viewer)

[cheney31]

HSC 2007 Question 24 (b) (ii) on page 19..
heres the paper
http://www.boardofstudies.nsw.edu.au/hsc_exams/exam-papers-2007/pdf_doc/chemistry_07.pdf
i really cant think of a CHEMICAL reason lol
btw the graph is just a straight line.

becoz i bought success one as second hand so it doesnt contain 2007 answers..
if any1 has the book could you type the answer for this question? or can any1 just do it.. LOL

thanks a lot

 

[Pwnage101]

uh, pretty easy - imcomplete combustion, results in a lower heat of combustion!!

 

[cheney31]

LOLOLOLOL...
gonna hit myself with a wall lol...


thanks..

 

[kooltrainer]

water evaporation can also be one... Flame caused some of the water vapours to evaporate, making water cooler than it should be.

 

[minijumbuk]

water evaporation can also be one... Flame caused some of the water vapours to evaporate, making water cooler than it should be.

I think that's considered a physical factor, not chemical.