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Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN: 9781259696527
Author: J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher: McGraw-Hill Education
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
Transcribed Image Text:At 0 °C 20 g of ice are added to 50 g of water at 30 °C in a vessel that has a water
equivalent of 10 g. Calculate the entropy changes in the system and in the
surroundings. The heat of fusion of ice at 0 °C is 6.02 kJ mol, and the specific
heat capacities of water and ice may be taken as constant at 4.184 and 2.094 J K
-1
g, respectively, and independent of temperature.
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- An Inventor claims to have developed a refrigeration unit which maintains the refrigerated space at -3°C while operating in a room where the temperature is 27°C, and which has a coefficient of performance of 9.5. How do you evaluate his claim?arrow_forwardNeed asaparrow_forwardHeat and Mass Transfer Question: From the answered problem below, assume 361 K as Teo or Cp = 4.184 kJ/kg K Water Flowing at a rate of 0.667 kg/s enters a countercurrent heat exchanger at 308 K and is heated by an oil stream (Cp = 1.89 (kJ/kg K) at 383 K at a rate of 2.85 kg/s, the overall U = 300 W/m² K and A= 15.0m². Calculate: a) heat-transfer rate (q) b) exit water stream temperature (T.co) Given: mH = 2.85 kg/s Tci = 308 K СpH = 1.89 kJ/kg K mc = 0.667 kg/s U = 300 W/m² k Assuming: A = 15.0m² Tco1 = 370 K Cpc = 4.192 kJ/ kg Karrow_forward
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