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19 Nov 2019
Please help with these thermo questions, i am stumped
One kmol of an ideal gas is taken through a four-step cyclic process as displayed on the PV diagram below (Fig. 1). The gas is subjected to an isothermal expansion at 600 K. from 5 to 4 bar (A to B), an adiabatic expansion to 3 bar (B to C), a constant -P cooling (C to D), and constant-V heating (D to A). All processes are assumed reversible. For these processes, it is reasonable to assume C_p is constant and equal to 30 kJ/(kmol. K) Calculate Q, W, delta U^t, and delta H^t for each step and for the entire process. A sealed 0.1 m^3 vessel holds pure cyclohexane (MW=84.161 g/mol) at 830.4 K. and 9.7 MPa. Use the three-parameter theory of corresponding states with the Lee/Kessler correlations to determine the mass of cyclohexane in the vessel. State your answer in kilograms Using the virial equation truncated to two terms, calculate the pressure in a 0.5-m^3 vessel when it is charged with 10 kg of carbon dioxide (MW=44.0 g/mol) at 30^degree C? The Boyle temperature is the temperature for which: lim_P rightarrow 0(partial differential Z/partial differential P)_T = 0 Show that the second virial coefficient (B) is zero at the Boyle temperature Use the generalized correlation, Eq. (3-63), to estimate the reduced Boyle temperature for simple fluids. The simple fluid has an omega =0.
Please help with these thermo questions, i am stumped
One kmol of an ideal gas is taken through a four-step cyclic process as displayed on the PV diagram below (Fig. 1). The gas is subjected to an isothermal expansion at 600 K. from 5 to 4 bar (A to B), an adiabatic expansion to 3 bar (B to C), a constant -P cooling (C to D), and constant-V heating (D to A). All processes are assumed reversible. For these processes, it is reasonable to assume C_p is constant and equal to 30 kJ/(kmol. K) Calculate Q, W, delta U^t, and delta H^t for each step and for the entire process. A sealed 0.1 m^3 vessel holds pure cyclohexane (MW=84.161 g/mol) at 830.4 K. and 9.7 MPa. Use the three-parameter theory of corresponding states with the Lee/Kessler correlations to determine the mass of cyclohexane in the vessel. State your answer in kilograms Using the virial equation truncated to two terms, calculate the pressure in a 0.5-m^3 vessel when it is charged with 10 kg of carbon dioxide (MW=44.0 g/mol) at 30^degree C? The Boyle temperature is the temperature for which: lim_P rightarrow 0(partial differential Z/partial differential P)_T = 0 Show that the second virial coefficient (B) is zero at the Boyle temperature Use the generalized correlation, Eq. (3-63), to estimate the reduced Boyle temperature for simple fluids. The simple fluid has an omega =0.