# Quiz1 - description of interesting temperatures and...

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7A -C/D Win 09 Quiz 1 DL Sec Last 6 digits ID # Name (Last, First) Grade 1. A 100 gram block of ice is placed on a 5 kg block of lead (Pb). The ice is initially at -10° C, while the Pb block is initially at +80° C. The two blocks are contained within a well-insulated box. Given that all of the ice will melt , construct an energy system diagram (including carefully stated initial and final conditions), write an appropriate energy conservation equation, and solve for the final equilibrium temperature. You must show your work clearly to receive credit! 2. The diagram to the right shows temperature vs. energy added for a 1-kg sample of an unknown pure substance. Give as much information as you can about the physical properties of the substance. Your answer should at least include a comparison of specific heats for different phases,

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Unformatted text preview: description of interesting temperatures, and something about heats of melting and vaporization . Please explain clearly but concisely! ∆Ε th = mc ∆Τ H 2 O: ∆Η melting = 334 kJ/kg liquid: c = 4.18 kJ/(kg K), solid: c= 2.05 kJ/(kg K) ∆Ε bond = ( ∆ m) ∆Η Pb: ∆Η melting = 23 kJ/kg solid Pb: c = 0.13 kJ/(kg K) ∆Ε th = mc ∆Τ H 2 O: ∆Η melting = 334 kJ/kg liquid: c = 4.18 kJ/(kg K), solid: c= 2.05 kJ/(kg K) ∆Ε bond = ( ∆ m) ∆Η Pb: ∆Η melting = 23 kJ/kg solid Pb: c = 0.13 kJ/(kg K)...
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## This note was uploaded on 09/13/2010 for the course PHY 7A 56192 taught by Professor ? during the Winter '09 term at UC Davis.

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Quiz1 - description of interesting temperatures and...

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