4. (20 points) Consider the partial decomposition of gaseous 6130628eada6b.jpg Please calculate (a) the temperature at which 613062af25af7.jpg at a total pressure of I atm [10 points] and (b) the total pressure at which613062ea1c030.jpgat 2000 K [10 points], given that△G° = 225,400+7.90TInT -209.47 J for this reaction.