L2slides

L2slides - . . < .‘ a . I. ‘ . - . . _ .4;

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Unformatted text preview: . . < .‘ a . I. ‘ . - . . _ .4; .Haunh.§umfis.rdskw%gfi§r Bourdon tube Pointer Pinion Link Sector P (5) FIGURE 3.4—3 Bourdon gauge Sec. 1.5 Temperature lron boils 5500 2800 5000 2700 3000 Molybdenum mells . 2600 E; 5000 500 fi Iridium melts 4500 2 ‘E 2400 3 Silicon boils 2300 O a. 4500 3. 5‘ 4000 2200 2500 :8" a ‘0 Aluminum boils 2100 g: Alumina melts 2000 - 4000 ‘5’- l - a) Rhodium mels 3500 1900 a ‘t‘ilonium meils 1800 E Plolsnum melts 3506 1700 2000 g £3 . 3000 - 5 :2 Lead bulls 1500 E 3 Iron mells 2 Nickel melts 1500 Sitcon melts {3" 3000 2500 1400 :an 1300 : 533 1200 ‘500 SE (Bless meils 2500 - . Gold melts 2000 1100 TI Silver melts 1000 O l 900 :0 R" D” Bruss me :5 2090 1500 g E ' Sodium chloréde malls 500 g. E“: a“ 700 1000- g E, a e S 5‘ 1- 600 H 5-; Q 1500 2000 500 g e. D . CD Sulphur boils _; 400 g g 2% Mercury boils moo- 300 :3? i g 500 500 e e" I 200 g § :3“ 212 100 3- § e 500 e“ 2 Water freezes -——-——-——32 G :1? Oxygen boils Hydrogeu boils Helium boils 0 ~459.58 2?3.35 0 H H Absoiule zero Figure 1.3 Temperature measuring instruments span the range from near absolute zero to beyond 3000 K. The chart indicates the preferred methods of thermal instrumentation for various temperature regions. 37 snail {011110 OII 'dUb'UlLIUS LCIU U11 L116 1\:1u.tu.u\. cyan. u; 7.4/42: LU luv . , .... -- larly, "273.15%: will be rounded off to --273°C. In Fig. 1.4 all the values of the temperatures have been rounded off, but more significant figures can he used. 0°C and its equivalents are known as standard conditions of temperature. 212 672 Boiling painT of 373 me water at "(‘60 mm Hg 32 492 Freezing point at water t a: .c: C m L— 4:: :3 LL. AMOIUTE “"0 Figure 1.4 Temperature scales. You should recognize that,the unit degree (i.e., the unit temperature differ— ence) on the kelvin—Celsius scale is not the same size as that on the Rankine- Fahrenheit scale. If we let A“? represent the unit temperature difference in the Fahrenheit scale, A°R be the unit temperature difference in the Rankine scale, and 13°C and AK be the analogous units in the other two scales, you should be aware that A°F == A°R (1.13) A°C m AK (1.14) Also, if you keep in mind that the AT is larger than the 13°F, ...
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This note was uploaded on 03/29/2009 for the course CHE 100 taught by Professor Monbouquette during the Fall '07 term at UCLA.

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L2slides - . . &amp;lt; .‘ a . I. ‘ . - . . _ .4;

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