Question 3: Determine the free energy of oxidation of Cr at 300C in an atmosphere with oxygen partial pressure of 10-4 atm. 10 10+ 10+ 10* 10 Hy/H2O RATIO COCO, RATIO 101 102 103 104 107 108 109 10 777 19 10 TO 10-1 102 6FD0,- 2F20,0 10- -100 101 M 10- 10 10+ 1 200 4Cu + 0 = 2040 2NONO 41 10- 10 4Fe +-68,0 2C0.0,- 2000 M 10- 10 2000, 200, 24.02.0 2Fe +0,260 10 C.0,-C0 100 2C+0,- 200 110.40 10 102 10-0 10 M 10 10- 2 AG = Rin Poy (kilojoules) 600 M 100 100 = {cro. 104 20, 2100 100 700 104 10 SiO, SO Tito TO 10-1 -800 10% 10 100 900 410 10 10- M A+ 0.410. -1000 101 10 to -1100 10-10 410 2M9+ 0,2M00 20:0, 2010 M melting point boing point M melting point of vide -3200 10 10-10 Y100410 0 200 400 1400 1600 10" 500 BOO 1000 1200 TEMPERATURE (C) Poz (tm) 10-60 10-10 10 109 10 10-0010-0 CO/CO2 RATIO 100