Helium is compressed through a compressor steadily. At the inlet the pressure is and the temperature is . At the exit the pressure is and the temperature is . The power input is and the heat loss rate is during this process. Neglect the kinetic and potential energy changes. Assume helium is ideal gas with a constant specific heat and its specific heat ratio , which means that enthalpy can be calculated using . Calculate the enthalpy per unit mass at the inlet _________ 1Helium is compressed through a compressor steadily. At the inlet the pressure is P₁ = 100kPa and the temperature is 7₁=300K. At the exit thepressure is P₁= 600kPa and the temperature is T₂=390K. The power input is W=5000kW and the heat loss rate is Q=1000kJ/s during12this process. Neglect the kinetic and potential energy changes. Assume helium is ideal gas with a constant specific heat c=5.1926 kJ/kg . K and itsPinlet hСPspecific heat ratio k=—= 1.667, which means that enthalpy can be calculated using h=c_T. Calculate the enthalpy per unit mass at theCP1outkJ/kg

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Helium is compressed through a compressor steadily. At the inlet the pressure is and the temperature is . At the exit the pressure is and the temperature is . The power input is and the heat loss rate is during this process. Neglect the kinetic and potential energy changes. Assume helium is ideal gas with a constant specific heat and its specific heat ratio , which means that enthalpy can be calculated using . Calculate the enthalpy per unit mass at the inlet _________

1
Helium is compressed through a compressor steadily. At the inlet the pressure is P₁ = 100kPa and the temperature is 7₁=300K. At the exit the
pressure is P₁= 600kPa and the temperature is T₂=390K. The power input is W=5000kW and the heat loss rate is Q=1000kJ/s during
1
2
this process. Neglect the kinetic and potential energy changes. Assume helium is ideal gas with a constant specific heat c=5.1926 kJ/kg . K and its
P
inlet h
С
P
specific heat ratio k=—= 1.667, which means that enthalpy can be calculated using h=c_T. Calculate the enthalpy per unit mass at the
C
P
1
out
kJ/kg

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