chemistry
posted by christine .
Metal Specific Heat (J/gC)
Al (s) 0.900
Au(s) 0.129
Cu(s) 0.385
Fe(s) 0.444
Hg(l) 0.139
H2O(l) 4.184
C2H5OH(l) 2.46
Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copper initially at 93.8o C.
i keep coming up withthe wrong answer for this
i am getting 1822.111
713.6=28.2(.385)(Tf93.8)
i am getting 1822.111
but when i punch it back into the equation its wrong
please help

I don't get 1822.11 no matter how I do it. First, are you using 28.2 g for the metal? The problem states 48.2 g
713.6 = 48.2*0.385(Tf93.8) and I get something like 55.3 C. If I check that number, I get this.
q = mass x sp. h. x (TfTi)
q = 48.2 x 0.385 x (55.393.8)
q = 48.2 x 0.385 x (38.5)
q = 714.4 (the small difference is caused by rounding the final T to three s.f. My calculator reads 55.345 and that rounds to 55.3 to 3 s.f. If I used 55.345 I get
q = 48.2*0.385*(55.34593.8)
q = 48.2*0.385*(38.455) = 713.61 which is very close.
Respond to this Question
Similar Questions

ocean county college
A 150 g sample of metal at 55.0 C raises the temperature of 150 g of water from 23.0 C to 35.0 C. Determine the specific heat of the metal in J/g C. Hint: #1 First find heat absorbed by water using formula q = mass x specific heat … 
chem
help with this problem pease Metal Specific Heat (J/gC) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 101.0oC and a mass of 86.0 g is dropped into a beaker of … 
Chemistry
Metal Specific Heat (J/gC) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 95.0oC and a mass of 67.0 g is dropped into a beaker of water containing 100 g at a … 
chemistry
I really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/gC) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 … 
CHEMISTRY
really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/gC) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 … 
Chemistry
How do you work this one problem? Metal Specific Heat (J/gC) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from 
chemistry
Metal Specific Heat (J/gC) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copper initially … 
college chemistry
Consider the following metals. Metal Specific Heat copper 0.385 J/(g · °C) magnesium 1.02 J/(g · °C) mercury 0.138 J/(g · °C) silver 0.237 J/(g · °C) lead 0.129 J/(g · °C) If the same amount of heat is added to 25.0 g of … 
chemISTRY
A hot lump of 33.2 g of copper at an initial temperature of 70.5 °C is placed in 50.0 mL of H2O initially at 25.0 °C and allowed to reach thermal equilibrium. What is the final temperature of the copper and water given that the specific … 
chemistry
A hot lump of 46.9 g of copper at an initial temperature of 54.5 Ã‚Â°C is placed in 50.0 mL of H2O initially at 25.0 Ã‚Â°C and allowed to reach thermal equilibrium. What is the final temperature of the copper and water given …