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) 114o F., (iv) 0° F., (v) – 30o F.

:

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

:

9. Convert from the Centigrade to the absolute scale (i) 6o C., (ii) 80o 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 150° 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 39o 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.

10.

THE VOLUME OF A MASS OF GAS.

50 c.c. of

107

gas at 10°C. оссиру what volume at 24°C.? 11. 100 c.c. of air at 12°C. are heated until they 145 c.c.

оссиру

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. 150 c.c. of gas are measured off at 10° C. and 500 m.m. What does the volume become at 16.4° C. and

520 m.m. ?

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.

Find the

Find

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

At what

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

52° C.,

the

26. 1234 c.c. of normal gas are cooled to pressure being decreased to 617 m.m. Find the new

volume.

27. 632 c.c. of air at 43° 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?

30. 123 c.c. of gas at 247° C. and 800 m.m. are cooled to 26° C., the pressure being decreased to 780 m.m. Find the new volume.

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

the new volume.

Find

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