Posted by **sam** on Friday, April 25, 2008 at 2:45pm.

if the specifc heat of iron = 0.46J/g C,how much heat is needed to warm 50g of iron from 20C to 100C

-- I do not know how to make the celcius o above the temperature number

my anwswer

Q = Mx(delta)TxC

Q=50gx80Cx0.46J/gC

Q = 1840 Joules

Delta = the triangle I do not know how to make that on the computer

- science -
**DrBob222**, Friday, April 25, 2008 at 3:19pm
I don't know how to make the delta on the computer either. I usually write as you did. I note that some students use DH for delta H, DT for delta T, DS for delta S, etc.

You answer of 1840 Joules is correct. Good work.

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