MasteringPhysick Homework Chapter 12 Google Chrome Secure l https//session.maste

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MasteringPhysick Homework Chapter 12 Google Chrome Secure l https//session.masteringphysics.com/myct/itemView?offset next&assignmentProblemID; 74168569 PHYS 101 OCH Spring 2017 Homework Chapter 12 Problem 12.48 Problem 12.48 Part A What is the mass of the copper block? The specific heats of copper and water are 385 J/(kg .K) and A copper block is removed from a 400 Coven and dropped into 1.30 kg of water at 230 C The 4190 J/(kg. K) respectively water quickly reaches 30.5 Cand then remains at Express your answer to three significant figures and include the appropriate units. that temperature a m Value Units Submit My Answers Give Up Co m

Explanation / Answer

heat loss = heat gain

heat lost by the copper block = heat gain by the water

m(copper)c(t2(copper)t1(copper))=m(water)cwater(t2(water)t1(water))

Q=m(water)cwater(t2(water)t1(water)) = 1.3*4190(30.5-23) = 40852.5 J

m(copper)=Q/c(copper)/(t2t1) = 40852.5/385(400-30.5) = 0.287 kg

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