1. Thermal conductivity of gases changes with respect to temperature and pressure. When thermal conductivity data for a particular compound cannot be found, the principle of corresponding states as shown in FIGURE 1 can be used using a known experimental value. Using this principle, estimate the thermal conductivity of gases according to TABLE Q1 at 1 atm and 90C. TABLE Q1 Gases to be calculated Experimental value and its conditions N2 k = 0.026 W/m. K P = 1 atm T = 300 K 10 9 8 oma V 00 DO 7 6 40 30 20 10 5 5 4 P, = 40 3 Saturated liquid 30 20 Reduced thermal conductivity, k, = k/kc 1 0.9 0.8 0.7 0.6 0.5 0.8 10.6 0.4 10.4 -0.10.22 0.3 = 'd P, = 0 S 0.2 Saturated vapor 0.1 0.3 0.4 0.6 5 6 7 8 9 10 0.8 1.0 2 3 4 Reduced temperature, T, = T/T, FIGURE Q1 [30 Marks]