Respostas incropera

ANSWERS TO END-OF-CHAPTER PROBLEMS Fundamentals of Heat and Mass Transfer (5 th Edition) Introduction to Heat Transfer (4 th Edition) F.P. Incropera And D.P. DeWitt
CHAPTER 1
1.1 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.21 1.22 1.23 1.25 1.27 1.28 1.30 1.31 1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.39 1.40 1.41 1.43 378°C 4312 W, $4.14/d 0.10 W/m⋅K 8400W 19,600 W, 120 W 54 mm 2 16.6 W/m , 35.9 W 375 mm 110.40°C, 110.25°C 1.1°C 2 (a) 9800 W/m 2 2 (a) 1400 W/m ; (b) 18,000 W/m 2 (a) 22.0 W/m ⋅K; (b) 22.12, 0.6 2 2 4570 W/m ⋅K, 65 W/m ⋅K 51.8°C, 3200°C 6.3 m/s 0.35 W, 5.25 W 2.94 W 15 mW 2 6.4 W/m ⋅K 102.5°C 254.7 K 726 W, 547 W (a) 18,400 W; (b) $6450 3.5% (a) 0.223 W; (b) 3.44 W (a) 8.1 W; (b) 0.23 kg/h 100°C 5 3 2 (a) 0, 144 W, 144 W, 0; 0, 0, 144 W, -144 W; (b) 2.04 × 10 W/m ; (c) 39.0 W/m ⋅K (a) 0.052°C/s; (b) 48.4°C 364 K, 380 K 6380 kWh, $510 or $170 (a) 4180 s; (b) 319 K, 359 K; (c) 830 K 3 (a) 0.0181 m /s, 4.7 m/s 840 kW 2 2 (a) 32.5 kW/m , 126 kW/m , 17.6 K/s, 68.4 K/s (a) 104 K/s; (b) 1251 K

1.46 1.47 1.48 1.49 1.50 1.51 1.53 1.54 1.55 1.56 1.59 1.60 1.61 1.62 1.63 1.65 1.66 1.67 1.68 1.69 1.70 1.71

(a) 1950 A 132 J/kg⋅K (a) –0.089 K/s; (b) 439 K -3 (a) 1.41 × 10 kg/s 3.2 h -3 2 2 -3 2 (a) 60.6 × 10 kg/s⋅m , 121 g/m ; (b) 32.3 × 10 kg/s⋅m 49°C -3 3 (a) 7.13 × 10 m /s; (b) 70°C (a) 86.7°C; (b) 47°C (a) 79.1 K; (b) 457 mW 37.9°C (a) 600 K 2 375 W/m ⋅K 2 (a) 5500 W/m ; (b) 87.8°C (a) 5268 W; (b) 41°C 345°C (a) 84°C 214 K, 20.0 mW (a) 190.6 W (a) 153°C 2 (a) 386 W/m ; (b) 27.7°C; (c) 55% (a) 47.0°C or 39.9°C

CHAPTER 2
2.7 2.8 2.9 2.11 2.12 2.14 2.15 2.17 2.18 2.19 2.22 2.23 2.24 2.25 2.26 2.40 2.41 2.43 (a) 200 K/m, -5000 W/m2 ; (b) 225°C, 6250 W/m2 ; (c) -20°C, -5000 W/m2 ; (d) -85°C, -160 K/m; (e) -30°C, 120 K/m 2 2 2 (a) –280 K/m, 14.0 kW/m ; (b) 80 K/m, -4.0 kW/m ; (c) 110°C, -8.0 kW/m ; (d) 60°C, 4.0 2 2 kW/m ; (e) -20°C, -10.0 kW/m 2 2 2 (a) 2000 K/m, -200 kW/m ; (b) –2000 K/m, 200 kW/m ; (c) 2000 K/m, -200