Homework Help: Chemistry

Posted by Kelly on Friday, September 24, 2010 at 7:52pm.

A 40.0g sample of an unknow, yellowish-brown, pure metal was heated to 62degrees Celcius and put into a coffee cup calorimeter containing 85.0g of watera at 19.2 degrees Celcius. The water was heated by the hot metal to a temperature of 21.0 degrees Celcius. What is the specific heat of the metal? Is it possible that the metl is gold?

Chemistry - DrBob222, Friday, September 24, 2010 at 9:15pm
See above.
Chemistry - Shenellica Bettenourt, Thursday, November 1, 2012 at 5:31pm
1st find the heat of water in Joules. Heat absorbed by water is heat lost by metal.

Use this to find Specific heat of metal:
SH = J/mass*Change in Temp of metal
SH = 640.152J/40g*41C
SH = 390.33658854 x 10^-3
SH = .390 J/gC

It's not gold whose SPHeat is .131...it is likely copper perhaps.

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