A. 314 J
B. 6,573 J
C. 1,314,718 J
D. 4,187,000 J
Any help would be greatly appreciated.
2006-09-19 07:51:39 · 3 answers · asked by Katherine M 1 in Science & Mathematics ➔ Physics
coal releases heat when burned.
there for 451 f is required .
if you apply pressure is another story
2006-09-19 07:54:20 · answer #1 · answered by gussie r 3 · 0⤊ 0⤋
I'd need the specific heat of coal which I dont have on me right now... but it would be that number times number of grams (5)times degrees to be raised (200)
2006-09-19 14:58:08 · answer #2 · answered by spiffo 3 · 0⤊ 0⤋
from
http://www.taftan.com/xl/combus1.htm
The specific heat capacity of fuel is 3.2 kJ/kg,K
So, 3.2*200*5*1000=3200000J which does not match any of your answers. And is actually a very high specific heat since it it rare to see a value greater than 3kJ/kg,K. So I would go with C since A and B are nonsensical and D is too high. Funny that answer D is what you would expect for water (under pressure so as not to boil).
2006-09-19 15:59:37 · answer #3 · answered by Doctor Dense 1 · 1⤊ 0⤋