Quiz Grade _________         Quiz 4       Recitation Section ____
February 16, 1996                CHM 1045 -- 8:00 am -- Dr. Light
     Names           SSN                Names          SSN

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(4)1.The specific heat of ethanol is 2.46 J/g-oC.  How many joules
     of heat are required to heat 435 g of ethanol from 25.15 oC to
     34.91 oC?














2.   When a 12.4 g sample of solid sodium hydroxide dissolves in
     100.0 g of water in a coffee cup calorimeter the temperature
     rises from 22.3 oC to 53.0 oC.  The specific heat of water is
     4.184 J/g-oC.  Assume the specific heat of the final solution
     is the same as that of water.

(3)  (a)  How much heat is produced in the reaction?









(3)  (b)  Calculate þH (in kJ/mol of NaOH) for the solution
          process:

               NaOH(s)  ---->  Na+(aq)  +  OH-(aq)