A. How much heat is needed to take a 12.4g piece of ice at -12.3oC to 100.0oC gas?

Posted on 2016-05-20 18:46:00 in Chemistry by RIMY

a. How much heat is needed to take a 12.4g piece of ice at -12.3oC to 100.0oC gas. 
(ΔHvap = 40.8 kJ/mol, ΔHfus = 6.01 kJ/mol, Cice = 2.03 J/g oC, Cwater = 4.18 J/g oC.) 


b. Your have a 34.5g block of an unknown substance at 25.4oC, you add 13.1 kJ of heat to the metal and turned completely liquid. The temperature of the liquid is 127.1 oC. In a previous experiment your had determine the specific heat of the metal was 0.328 J/g oC. What is the ΔHfus of the unknown metal? (the molar mass of the unknown substance is 22.7g/mol)

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