Chapter 16 Answer Key: Conservation of Heat Energy (First Law of Thermodynamics)

Chapter 16: Conservation of Heat Energy – Key

16.1 Conservation of Heat Energy

1.  34.4 °C

2.  30.6 g

3.  56.2 °C

4.  82.7 °C

5.  84.3 °C

6.  38.6 °C

7.  0.82 kg

8.  0.0524 kg

9.  0.247 kg 1

0.  74.4 °C

11.  16.7 °C

12.  35.8 °C

16.2 Heat & Mechanical Energy

1.  0.82 °C

2.  430 m

3.  97.8 °C

4.  313 m drop

16.3 Heat, Energy, Power & Efficiency

1.  3.05 J/s or W

2.  670 s

3.  742 J/s or W

4.  – 127 J/s or W

5.  5.6 minutes

6.  – 6280 J/s

7.  64%

8.  2.2 kg

9.  3.5 °C

10. 1.14 kJ

16.4.1 WAIS

1.  (i)  1.73 x 10¹² m³ (ii)  1.59 x 10¹⁵ kg (iii)  6.8 x 10²⁰ J

     (iv)  0.0033 °C  (insignificant)

16.4.2 Heat Energy of the Oceans

1.  (i)  4.39 x 10²³ J (ii)  42.2 days of no sunlight