Given the following specific heats: Cu=0.377(J/g celsius), Al=0.885(J/ g celsius

Question

Given the following specific heats: Cu=0.377(J/g celsius), Al=0.885(J/ g celsius), Pb=0.129 (J/g celsius). If the same amount of heat is added to 25.0 g of each of these metals, all at the same initial temperature, which metal will have the highest final temperature? Choices A) Al B)Pb C) Cu Note: Show work Answer: B

Explanation / Answer

Let the initial temp. be T Now for Cu Q = 25*0.377*(T.final - T) => T.final = Q/(9.425) + T Now for Al Q = 25*0.885*(T.final - T) => T.final = Q/(22.125) + T Now for Pb Q = 25*0.129*(T.final - T) => T.final = Q/(3.225) + T Thus we see that Q/(3.225) + T is maximum among the three Answer is Pb

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