3. The fol g time-temperature data were col (GMM 8203 g mol was 4.045 J g deg wa

Question

3. The fol g time-temperature data were col (GMM 8203 g mol was 4.045 J g deg was dissolved in 100.00 ml of water The heat copectity of th when 1400 g anhydrous of the res time, min imein 70 8.0 9.0 10.0 11.0 12.0 0.5 1.5 23.50 23.45 23.49 29.05 3.5 4.5 mix 28. 20 23.50 23.50 2795 27 27 35 13.0 14.0 15.0 28.30 27.10 6.0 29.00 ) Prepare a graph by plotting the temperature on the y-axis (the ordinate) and the time on the x-asxds (2) Calculate T for the process, using Equation 9. 7s Th nal-Tin.tial- hnal Tinhal (3) Calculate the heat transferred, Q, using Equation 5 answer

Explanation / Answer

4.

a. dT = 20.06 - 25 = -4.94 oC

b. q = 100 x 4.184 x -4.94 + 4.045/-4.94

        = -2.068 kJ

c. moles of sodium acetate trihydrate = 16 g/136.08 g/mol

                                                            = 0.12 mol

d. dH = -2.068/0.12

          = -17.233 kJ/mol

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