14 Conneer News Pane 10000 90.22 SO 25 9.7 Neptune 1,200 {v 1,000 800 Pressure, si C 600 Ethe 400! Dew point line Bubble-point tine 200 A is N-heptane A, B, 100 B 8 300 400 Temperature, F 500 Use Figure 3 to answer the questions below. (a) What does the dashed line represent? (b) Assess the following curves, and state the mole % for both ethane and n-heptane: (0 Curve 2. (ii) Curve 3. (iii) Curve 4. (c) For a mixture of 90.22 mole percent ethane and 9.78 mole percent n-heptane, evaluate: 0 The critical pressure and critical temperature (1) The bubble-point pressure and dew-point pressure at 100F. (ii) The cricondenbar and cricondentherm. (iv) The temperature range in which retrograde condensation will occur