Post
by Red Beard » Wed Oct 03, 2007 11:40 pm
90%
I suspect the test is bs though, as one of my questions didn't even have the correct answer as an option:
Q46
"Rapidly compressing air and raising its pressure will have what effect?"
A - air will cool
B - air will heat up
C - no effect on temperature
First of all, they are saying the same thing twice...
Also, they seem to be forgetting that the amount of heat will not change, as no heat energy is entering the system (you are merely concentrating the heat energy already existing in the air), which means B (and definetly not A) are not correct. The result of the compression of air will be an increase in temperature (but not the amount of heat), which rules out C.
I'm guessing the creator of the test has not done much chemisty, and is not familiar with the ideal gas law: PV=nRT
I think I could be better spending my time on my engineering assignments, and not picking on internet questionairs....
Cheers,
RB
[SIGPIC][/SIGPIC]
Enjoying the great outdoors!