If a silver spoon placed in a cup of coffee absorbs 193.2 cal of heat causes the coffee to cool 0.75oC, what is the mass of the coffee? (Assume ccoffee = 1.0 cal/gCo) Give answer in kg.
2007-07-19 04:25:49 · 3 answers · asked by JT78 1 in Science & Mathematics ➔ Other - Science
Use the equation:
q=mcDT (delta T)
q= 193.2 calories
c = 1 cal/g C
DT= 0.75 degrees C
Just solve the equation for m.
2007-07-19 04:31:48 · answer #1 · answered by hcbiochem 7 · 0⤊ 0⤋
.2576 kg. However, you should really try to work these out yourself. This is basically stoichiometry. Basically you just need to set up the numbers you have so that the units cancel out, giving you the unit you want (grams here, which is then converted to kilograms).
2007-07-19 04:32:52 · answer #2 · answered by Tim M 3 · 1⤊ 0⤋
Are you serious!!! You can't figure this out???
Q = mc(Delta T)
Q/c(DeltaT) = m
(193.2cal) / (1.0cal/g-C)(0.75C) = m
m = 257.6 grams
I spent alot of time working on that problem so you BETTER give me the best answer!!!
2007-07-19 04:32:22 · answer #3 · answered by Anonymous · 1⤊ 6⤋