9HW 11/30/17 o This is a Numeric Entry question / It is worth 1 point / You have
ID: 583218 • Letter: 9
Question
9HW 11/30/17 o This is a Numeric Entry question / It is worth 1 point / You have unlimited attempts / There is no attempt penalty 05 Question ( point) O See page 393 In an experiment, 285 g of metal was heated to 98.0 C and then quickly transferred to 1500 g of water in a calorimeter. The initial temperature of the water was 23.5°C, and the final temperature after the addition of the metal was 32.5°C. Assume the calorimeter behaves ideally and does not absorb or release heat 4th attempt see Periodic Table QSeeHint What is the value of the specific heat capacity (in J/g C) of the metal? 3rd attempt 2nd attempt 8 OF 10 QUESTIONS COMPLETED 05/10 VIEW SOLUTION SUBMIT ANSWERExplanation / Answer
According to energy conservation law:
Heat lost by a body = heat gained by another body
Final temperature after addition of metal = 32.5 oC
heat lost by metal = mCpmT = 28.5 g x Cpm x (98.0 oC - 32.5 oC)
heat gained by water = 150g x Cpw x (32.5 oC - 23.5 oC)
Cpw = 4.18 J/g.oC
= 150g x 4.18 J/g.oC x (32.5 oC - 23.5 oC) = 5643 J = 28.5 g x Cpm x (98.0 oC - 32.5 oC)
Cpm = 3.023 J/g.oC
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