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10 Nov 2019
The organic compound acetylene (C_2H_2) has the following reported data: triple point: T= 192 K, P= 128 kPa critical point = T= 309 K, P = 6100 kPa (a) Sketch the phase diagram for acetylene in the space below. Assume that the solid-liquid phase boundary has a positive slope. Label the regions corresponding to the solid, liquid, gaseous, and supercritical fluid phases, and also label the triple point and critical point. (b) The standard molar entropy of acetylene (at a pressure of 1 bar) is 200.9 J K^-1 mol^-1. Calculate the change in free energy for a sample of 0.75 mol acetylene upon heating from 293.15 to 303.15 K at 1 bar.
The organic compound acetylene (C_2H_2) has the following reported data: triple point: T= 192 K, P= 128 kPa critical point = T= 309 K, P = 6100 kPa (a) Sketch the phase diagram for acetylene in the space below. Assume that the solid-liquid phase boundary has a positive slope. Label the regions corresponding to the solid, liquid, gaseous, and supercritical fluid phases, and also label the triple point and critical point. (b) The standard molar entropy of acetylene (at a pressure of 1 bar) is 200.9 J K^-1 mol^-1. Calculate the change in free energy for a sample of 0.75 mol acetylene upon heating from 293.15 to 303.15 K at 1 bar.
Jarrod RobelLv2
8 Jan 2019