(a) 3.556 x 10 J x 1 kJ
10 J = 3.556 x 10 kJ
(b) 3.556 x 10 J x 1 cal
4.184 J = 8.499 x 10 cal
(c) 3.556 x 10 J x 1 cal
4.184 J x 1 kcal
10 cal x 1 Cal
1 kcal = 849.9 Cal
6
3
3
65
6
3
250.0 J = 56.26 g x 4.18 J
g C x (X - 28.0) C
1.063 = X - 28.0; X = 29.1 C
0
0
0
38.9 J = X 0.382 J
g C (75.0 - 25.0) C
101. = 50.0 X; X = 2.04 g
0
0
8
⋅
150.0 g 4.18 J
g C (X- 20.0) C + 35.25 g 0.908 J
g C (X - 95.0) C = 0
627 (X - 20.0) + 32.0 (X - 95.0) = 0
627X - 1.25 x 10 + 32.0X - 3.04 x 10 = 0
659X - 1.56 x 10 = 0
X = 23.6 C
0
0
0
0
43
4
0
⋅⋅
CHE100
Problem Session #2 Answer Key
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