This page contains answers to the practice exercises for Lesson 2 in the workbook.

4.     a. A
        b. exothermic
        c. release
        d. B
        e. endothermic
        f. use

8.     a. (The slopes of the lines are arbitrary.)

         b. (The slope of the first line should be about half that of the second.)
         

11.    a. 1.8 x 10² cal
        b. 1.1 x 10⁴ cal
        c. 24.5 ^oC
        d. 1,000 g

12.    a. 48 ^oC
        b. 17 cal
        c. 0.11 cal/g^oC
        d. 0.058 cal/g^oC
        e. 0.4 cal/g^oC

15.    a. 80 cal/g
        b. -80 cal/g
        c. 9,600 cal
        d. 2,800 cal
        e. 600 g

16.    a. 3,900 cal (2 sig. dig.; don't round the individual heats for each step, wait until the final result of 3925.77 cal and then round to 2 s.d.)
        b. 240 g of water at 22 ^oC

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