Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: hannah on January 31, 2006, 10:13:33 PM
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Umm...Okay the questions is
"The decay of 1 mole of cobalt-60 by beta- emission is represented by the equation:
60 0 60
C --> e + Ni
27 -1 28
How much energy in kilojoules is released in this reaction if the products have .0032 g less mass than the reactant?
So...I think my teacher wanted us to do deltaE=deltamc^2, and I changed the grams to kilograms and ended up with something like 2.88 x 10^13, but the answer in my book says 2.9 x 10^8...so i'm not sure what I did wrong.
Hannah
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Follow my work here, you can check it again:
dm = 0.000032; c2 = 9.10(16) --> dE = 2.88.10(12) (J).
So dE ~ 2.9.10(9) (kJ). I think so.
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Sorry I use (.) instead of (x)
dE = 2.9x10(9) (kJ)
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Ohhhhh I think i just missed the kilo part there...Thank you!