Posted by Dee on Sunday, November 4, 2012 at 5:29pm.
a 55g aluminum block initially at 27degrees C absorbs 725J of heat. What is the final temp.
I know I need to use the equation
q=m*Cs*Delta T but I cannot figure out how to rearrange the equation to isolate Tf to get the answer.
Thanks for any help.

chemistry  DrBob222, Sunday, November 4, 2012 at 5:41pm
My experience is NOT to try rearranging it before you subtitute. I think it is far easier to substitute, then solve the equation.
q = mass x specific heat x (TfTi)
725 = 55 x specific heat Al x (Tf  27).
What Al? about 0.3 or so J/g?
725 = 55 x 0.3 x (Tf27)
725 = 55*0.3*Tf  (55*0.3*27)
Multiply all that stuff inside the parentheses and solve the resulting equation for Tf.