The phase diagram for CO2 is shown in FIGURE 17-38.

(a) What is the phase of CO2 at T = 20 °C and P = 500 kPa?

(b) What is the phase of CO2 at T = -80 °C and P = 120 kPa?

(c) For reasons of economy and convenience, bulk CO2 is often transported in liquid form in pressurized tanks. Using

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7373 5707 Solid 516 ! ! ! ! ! ! Gas 101 ! ! -78.5 -56.6 2031 Temperature, T (°C) Pressure, P(kPa) Pinbri