TITLE.PM5

218 ENGINEERING THERMODYNAMICS dharm /M-therm/Th4-7.pm5 The processes or systems that do not involve heat are called (a) isothe ...

FIRST LAW OF THERMODYNAMICS 219 dharm /M-therm/Th4-7.pm5 Answers (a) 2. (a) 3. (d) 4. (a) 5. (d) 6. (d) 7. (a) (d) 9. (a) 10. ( ...

220 ENGINEERING THERMODYNAMICS dharm /M-therm/Th4-7.pm5 (ii) Just after the stone comes to rest in the bucket. LAns.()ii()iQ W E ...

FIRST LAW OF THERMODYNAMICS 221 dharm /M-therm/Th4-7.pm5 In the compression stroke of an internal-combustion engine the heat re ...

222 ENGINEERING THERMODYNAMICS dharm /M-therm/Th4-7.pm5 1 kg of air at 1.02 bar, 20°C is compressed reversibly according to a l ...

FIRST LAW OF THERMODYNAMICS 223 dharm /M-therm/Th4-7.pm5 (iii) If the specific volume at the nozzle exit is 0.5 m^3 /kg, find th ...

224 ENGINEERING THERMODYNAMICS dharm /M-therm/Th4-7.pm5 Steam at 7 bar and 200°C enters an insulated convergent divergent nozzl ...

FIRST LAW OF THERMODYNAMICS 225 dharm /M-therm/Th4-7.pm5 1 kg of steam at 7 bar, entropy 6.5 kJ/kg K, is heated reversibly at c ...

226 ENGINEERING THERMODYNAMICS dharm /M-therm/Th4-7.pm5 A cylindrical vessel of 5 m^3 capacity contains wet steam at 1 bar. The ...

5 Second Law of Thermodynamics and Entropy 5.1. Limitations of first law of thermodynamics and introduction to second law. 5.2. ...

228 ENGINEERING THERMODYNAMICS dharm /M-therm/th5-1.pm5 Co-efficient of performance, (C.O.P.)ref. = Q W (^2) ...(5.2) where, Q 2 ...

SECOND LAW OF THERMODYNAMICS AND ENTROPY 229 dharm /M-therm/th5-1.pm5 The energy transfer as heat and work during the forward p ...

230 ENGINEERING THERMODYNAMICS dharm /M-therm/th5-1.pm5 of the heat engine and heat pump acts then like a heat engine exchanging ...

SECOND LAW OF THERMODYNAMICS AND ENTROPY 231 dharm /M-therm/th5-1.pm5 5.6. Thermodynamic Temperature Take the case of reversible ...

232 ENGINEERING THERMODYNAMICS dharm /M-therm/th5-1.pm5 T + Tδ T 0 T Original system boundary δQ δW δWR Reversible heat engine δ ...

SECOND LAW OF THERMODYNAMICS AND ENTROPY 233 dharm /M-therm/th5-1.pm5 reverse the engine and for the reversible heat pump obtain ...

234 ENGINEERING THERMODYNAMICS dharm /M-therm/th5-1.pm5 (b)(c) Carnot engine cycle Carnot heat pump cycle Fig. 5.5 The assumptio ...

SECOND LAW OF THERMODYNAMICS AND ENTROPY 235 dharm /M-therm/th5-1.pm5 =− =− F HG I KJ 112 1 2 1 Q Q T T Q QmcT QmcT m p p 11 22 ...

236 ENGINEERING THERMODYNAMICS dharm /M-therm/th5-1.pm5 Let HEA be any heat engine and HEB be any reversible heat engine. We hav ...

SECOND LAW OF THERMODYNAMICS AND ENTROPY 237 dharm /M-therm/th5-1.pm5 5.10. Corollary of Carnot’s Theorem ‘‘The efficiency of al ...