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 (Tf-Ti)

725 = 55 x specific heat Al x (Tf - 27).

What Al? about 0.3 or so J/g?

725 = 55 x 0.3 x (Tf-27)

725 = 55*0.3*Tf - (55*0.3*27)

Multiply all that stuff inside the parentheses and solve the resulting equation for Tf.

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