CHAPTER III.

TEMPERATURES.

(See Sect. 15.)

1. CONVERT from the Reaumur to the Centigrade scale:(i) 36° R., (ii) 28° R., (iii) 76° R., (iv) 60° R., (v) 52o R.

2. Convert from the Centigrade to the Reaumur scale :— (i) 90° C., (ii) 15o C., (iii) 20o C., (iv) 55o C., (v) 30° C.

3. Convert from the Reaumur to the Fahrenheit scale:(i) 56° R., (ii) 60-4° R, (iii) 41.7° R., (iv) - 6.6° R., (v) - 25.3° R.

4. Convert from the Fahrenheit to the Reaumur scale:(i) 48° F., (ii) 129o F., (iii) 168o F., (iv) 210° F., (v) — 30° F.

5. Convert from the Centigrade to the Fahrenheit scale :(i) 60·5o C., (ii) 40o C., (iii) 70o C., (iv) – 5o C., (v) — 36·6o C.

6. Convert from the Fahrenheit to the Centigrade scale:(i) 207° F., (ii) 180° F., (iii) 114° F., (iv) 0o F., (v) – 30° F.

7. Convert from the Centigrade to the Fahrenheit scale:(i) 643o C., (ii) 720° C., (iii) 860o C., (iv) 973o C., (v) 1000o C. 8. Convert from the Fahrenheit to the Centigrade scale:-(i) 674o F., (ii) 100°F., (iii) 463° F., (iv) 3478° F., (v) 2941°F.

9. Convert from the Centigrade to the absolute scale :— (i) 6o C., (ii) 80° C., (iii) -40° C., (iv) — 14o C., (v) – 100°C.

10. Convert from the Fahrenheit to the absolute scale :(i) 70° F., (ii) -4° F., (iii) 104° F., (iv) 2000° F., (v) - 37° F.

11. Convert (i) 300°, (ii) 400°, (iii) 500° on the absolute scale into the Centigrade, Reaumur, and Fahrenheit scales.

12. Convert each of the following temperatures into the other two scales: 42° F., - 32° F., 327° R., — 2o R., 78° C., and 172° C.

CHAPTER IV.

THE VOLUME OF A MASS of Gas.

(See Sects. 14, 16.)

1. 1000 c.c. of gas are heated from 0° C. to 39° C. Find the new volume.

2. 1000 c.c. of gas are heated from - 39° C. to 52° C. Find the new volume.

3. The pressure on 10 c.c. of gas is 7 metres; if the pressure be reduced to 847 millimetres, what is the new volume?

4. 1000 c.c. of air at 13° C. occupy what volume at 65° C. ?

5. If 300 c.c. of gas are measured off at 28° C., what will the volume become at · 14° C. ?

6. 155 litres of air at 150o C. are cooled to 0° C. Find the new volume.

7. A litre of gas is heated from 14° C. to 42° C. Find the new volume.

8. A litre of air at 39° C. is cooled to - 26° C. Find the new volume.

9. 134 litres of air are heated from -30° C. to 60° C. Find the new volume.

THE VOLUME OF A MASS OF GAS.

107

10.

50 c.c. of gas at 10°C. occupy what volume at 24°C.? 11. 100 c.c. of air at 12°C. are heated until they occupy 145 c.c. Find the new temperature.

12. 1000 c.c. of air at - 31.2° R. are heated to 172.4° F. What is the new volume ?

13. 320 c.c. of gas are measured off at 91° C. and 950 What is the normal volume?

m.m.

14.

500 m.m.

150 c.c. of gas are measured off at 10° C. and What does the volume become at 16.4° C. and

520 m.m.?

Find the

15. 852 c.c. of air at 11° C. and 760 m.m. are heated to 27° C., the pressure being increased to 900 m.m. new volume.

16. 542 c.c. of air at 269° C. and 900 m.m. are cooled to 51o C., the pressure being decreased to 666 m.m, Find the new volume.

17.

672 c.c. of air at 49° C. and 1111 m.m. measure what at 357° C. and 1890 m.m.?

18. 700 c.c. of air at 77° C. and 1000 m.m. measure what at 163° C. and 872 m.m. ?

19.

546 c.c. of gas at 17° C. and 760 m.m. are cooled to 0° C., the pressure being decreased to 600 m.m. Find the new volume.

20.

1234 c.c. of gas at -39°C. and 500 m.m. are heated to 39o C., the pressure being increased to 617 m.m. Find the new volume.

21. A quantity of oxygen, which measures 230 litres at 14° C. and 740 m.m., will measure what at 0° C. and 760 m.m.?

22.

What will 1000 c.c. of a normal gas become at 16.5° C. and 735 m.m. ?

23. A flask, which will not bear a pressure of 1500 m.m., is filled with normal oxygen and heated. At what temperature will it explode ?

24. A volume of gas at 10° C. is under the pressure of the atmosphere and 60 m.m. of mercury; what pressure is required in addition to the atmosphere to keep the volume constant at 300° C. ?

25. At what temperature has air the same density as hydrogen at 0° C. ?

26. 1234 c.c. of normal gas are cooled to — 52o C., the pressure being decreased to 617 m.m. Find the new

volume.

27. 632 c.c. of air at 43o C. and 1000 m.m. are heated to 97o C., the pressure being decreased to 740 m.m. Find the new volume.

28.

146 litres of gas at 17° C. and 974 m.m. are heated to 51° C., the pressure being decreased to 760 m.m. Find the new volume.

29. 1000 c.c. of gas at 20° C. and 730 m.m. occupy what volume at 0° C. and 760 m.m?

to

30. 123 c.c. of gas at 247° C. and 800 m.m. are cooled

26o C., the pressure being decreased to 780 m.m. the new volume.

Find

31. 1000 c.c. of air are heated from 0° C. to 72o C., pressure being decreased from 600 m.m. to 400 m.m. the new volume.

the

Find

32. 20 c.c. of hydrogen at 27° C. and 762 m.m. occupy what volume at -23° C. and 1270 m.m?