Monday, May 24, 2010

A 5 gram penny (assume 100% copper) is heated over a Bunsen burner until its 600 degrees C. when the penny is?

A 5 gram penny (assume 100% copper) is heated over a Bunsen burner until its 600 degrees C. When the penny is set on a block of ice, it melts a puddle into the block. How much ice is melted to water?

A 5 gram penny (assume 100% copper) is heated over a Bunsen burner until its 600 degrees C. when the penny is?
Copper has a heat capacity of 378 J/kg.K


so 5 g of copper at 600 deg will release


0.005kg * 378J/Kg.K *600K = 1 134J


when going from 600 celsius to 0 celsius (a 600K difference)





Ice has heat of fusion of 334 kJ/Kg





so 1.134 kJ will melt


1.134kJ/334kJ/kg = 3.39x10^-3 kg = 3.39 g of water





Not much if you ask me! This shows the incredible heat capacity of water (and ice).


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