Homework Help: physics;changes in temp

Posted by sarah on Friday, January 21, 2011 at 7:38pm.

A 4.0 kg gold bar at 97C is dropped into 0.27 kg of water at 22C.
What is the final temperature? Assume the
specific heat of gold is 129 J/kg C.
Answer in units of C.

physics;changes in temp - DrBob222, Friday, January 21, 2011 at 8:25pm
heat lost by Au bar + heat gained by H2O = 0

[mass Au x specific heat Au x (Tfinal-Tinitial)] + [mass H2O x specific heat H2O x (Tfinal-Tinitial)] = 0
Solve for Tfinal.

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