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July 24, 2014

Homework Help: Chemistry. Please help!!

Posted by JJ on Friday, March 2, 2012 at 4:15pm.

Calculate the final temperature when a 18.7 gram sample of ice at 0 degrees C is placed into a styrofoam cup containing 113 grams of water at 71.6 degrees C. Assume that there is no loss or gain of heat from the surroundings.

Heat of fusion of ice = 333 Jg^-1
Specific heat of water = 4.184 JK^-1g^-1
a.) Final temperature = ________ degrees C

b.) Calculate the entropy change that occurs during this process.
Entropy change = ________ JK^-1

Please show and explain because I tried doing it but I messed up some distributions and I can't get the right answer.

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