{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

exam212EML3100sp05_2UP

# exam212EML3100sp05_2UP - EML3100 Exam 2.1.2 Name...

This preview shows pages 1–4. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: EML3100, Exam 2.1.2 3/2/05 Name SOLULi’LOﬂ lEML3100, Exam 2.1.2 3/2/05 1. Heat transfer is negative when 5. Calculate the change in enthalpy (in kJ) when 1 kg pyrex glass casserole dish is cooled from (a) heat is transferred to a system 207°C to 27°C. @ heat is transferred from a system A“ : mbh : m6? AT = mg? (1.1-2 ' ““573 (c) not enough information is given to determine this answer. 2. Work is positive when @ it is done by a system (b) it is done on a system (c) not enough information is given to deterrnlne this answer. AH : (i legal: D. 640 \$155; >(23 ”5“,. _‘ ZO?“€1§ :5 3. For each of the following work equations, write the process to which it applies. i AH -: _, l5 / 2 kJ— ? (a) 1W2=p1V11n% (a) W : mstmi" 1 n . 7 V — V : rm , a n (b) 1WZ = p-lz—p‘l (b) ?V (—Wdiarlli 6. Calculate the change in speciﬁc internal energy (in kJ/kg) when the ideal gas carbon monoxide ’” ? . ‘ ‘ (c0) is heated from 177°C to 1487°C. 1WZ = V2 — V1 w my,” D (c) p( ) (c) T: Ft? C + 23/3 ,_ 450 K I TL: \4642’, tuZ’i?) ’J Vital”) i‘x his s.- ” I, L “ w...“ 1W \V\ (cm ‘ 26:3“ my? '1. Temperature T ”C or K M ....... p , Using {hug/D .2. Pressure Pa, kPa, or MPa ”- is; - e“ H {a trial 75‘ , R“ as Mk: , w" £1 a: yikwao =5£FPSG EWWL, 4. Complete the following table of the intensivc thermodynamic state properties, 51:53. 61 F1: ('1. Va l u m £1. tom/Ms spam/5‘12; Mia/ml meg g .— “’“\ M 5 ﬁihzwhti l< 1- M "'LT! (5(9459 W143 ISHQ 27m) ﬂéwwkme s.“- l y W ; '52 earth V page 1 of 8 1E 40 '7. A piston-cylinder assembly contains 10 kg of superheated water Vapor (steam), initially at 700°C (C3 (537%th @ Q iﬁmﬁagmwm mmmmm mg (a) M7 ML3100, Exam 2.1.2 3/2/05 and 15 MPa‘ The steam is expanded to 1.8 m3 in a process such that pV" remains constant, with n = 1.373. 5/ (a) Draw a picture of the initial and ﬁnal states, and write the given information under each. 3 (b) What is the initial speciﬁc volume? What is the initial volume? What is the initial speciﬁc internal energy? What is the ﬁnal pressure? What is the ﬁnal speciﬁc volume? What is the ﬁnal temperature? What is the ﬁnal speciﬁc internal energy? What is the work (in kJ) for this process? What is the heat transfer (in kJ) for this process? Show all work, and specify tables used! Do not assume ideal gas behavior. DO NOT WRITE ABOVE THIS LINE! sham = [0 K3 T540132 'P = ‘5 M?“ \ WM”! [123% i“ 34‘” VF rm) :(lok3¥0,028¢1 {35): 028(0im azﬂ (e>?\l"=?v" r‘ G n 3 i.3:t'3 ,_._._._._____E i9 W?(~—; ): (\SMPat 272%] =‘it20 Mﬁri’lf PH page 3 of8 JEML3100, Exam 2.1.2 3/2/05 'TWB VH9: ”M W. G) 200 OJWBO 2(al'2.8 @ 250 0.59234 27mm @ Tm 0.18 um ! (o.16——O~‘(9330) =200 + (p. @234 0. man) (2571)“ 200) '3 g 200 +. (0.4244) (23 a 200) TW/22322c Tl ' um=u +(W'ZZJYM u) =2¢x25 + (onwarzem '2: game) P335?“’i (”MN M [Mr]: :[U 2MP¢CXL 6 m3) (is MEMO 25m m3 WWW“ )— p375 Sii‘iii k3 page 4 of 8 J'anf)“ TD lEML3190, Exam 2-1-2 3/2/05 IEML3100, Exam 2.1.2 3/2/05 ‘7. cant'd. Ibéwi. The City of Tallahassee has purchased a new boiler for the power plant. 25 kgs of Saturated liquid water enters the boiler at 70°C. ) g 1: m U‘ _ \3 "l” WW Superheated water vapor exits the boiler at 400°C and 5 MPa. ( J 3&1 AU + l Ni ( 2' U, l ‘54" The outlet pipe is 20 in higher than the inlet pipe. I h “t” , kJP A’ (2) Draw a schematic of this device. Write your assumptions {QLT- i0 kg (2“ 55‘ 25 is?! M j 410‘ 9 F5 > +— 5? H? 5 kI \\ (b) Write the pertinent info for each inlet and outlet flow. Be sure to list tables used. to (c) What is the heat transfer rate to/from this boiler (in kW)? a ( ‘ jr 5563. 33 KT» + 5 4 l 4. 5 iii % (d) (for this part only) If the steam were to exit the boiler with a velocity of 80 m/s, what would ' be the cross-sectional area of the exit pipe (in cmz)? Show all work, and specify tables used! 2 _ DO NOT WRITE ABOVE THIS LINE! ‘6); \842 {J . Hesumghoﬁ W :0 ‘ 35\$? rim 5‘ mm: W‘ AM" I) no valoaig 9’“ pupa clarinet-er“ mFo was: 292.98 g IEML3100, Exam 2.1.2 3/2/05 8. cant'd. 1 ; (25 %)(o.os-+9i E53 3 80% L : 0.0l804- ”3,00 m) ~—......_ W vlm 1 AZ=[80.1cm1( ...
View Full Document

{[ snackBarMessage ]}

### Page1 / 4

exam212EML3100sp05_2UP - EML3100 Exam 2.1.2 Name...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online