Thermodynamics and Fluid Mechanics Thermodynamics and Fluid Mechanics Physics Help Forum

 May 1st 2016, 08:34 AM #1 Junior Member   Join Date: Jan 2016 Posts: 12 Confused, Please Help Hi, I am stuck on a particular exercise. The problem is as follows: A 550g piece of metal at 95.0 degrees celsius is cooled to 30.0 degrees celsius and releases 1.63 x 10^4 J of energy. What is the specific heat capacity of the metal in J/g degrees celsius? Using the formula Q = mc(change in temp) 1.63 x 10^4 = 550g x 65 degrees x (c) 16,300 = 550g x 65 x (c) 16,300 = 35,750 x (c) divide both sides of equation by 35,750 c = 0.4559 I know this answer is incorrect as it needs to correspond with a type of metal with that specific heat capacity, but that does not exist in my choices. I feel like I am doing this correctly in every way. What am I missing?
 May 1st 2016, 09:11 AM #2 Junior Member   Join Date: Jan 2016 Posts: 12 I think I figured it out. Needed to convert it to J/kg Celsius giving me 456, close to the specific heat capacity of 450 for Iron or Steel. If I'm still wrong, someone please correct me. Cheers.
 May 1st 2016, 01:42 PM #3 Senior Member   Join Date: Jun 2010 Location: NC Posts: 418 Specific Heat Calculation Hi physicsboob, This post might be of interest. Check it out... http://www.thermospokenhere.com/wp/0...heat_calc.html Good luck, JP

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