CHY 102 Lecture Notes - Lecture 44: Equilibrium Constant, Rice Chart, Stoichiometry
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The reaction of n2 and h2 forms ammonia, nh3: At 600 k, kp is 4. 388 x 10-3. Kc = kp(rt)- n = kp(rt)2: kc = 4. 388 x 10-3[(0. 08314)(600)]2 = 10. 9. The value of kc for the above reaction is 0. 28 at 900 c. Assuming all gases behave ideally, what is kp at this temperature? (0 c = 273. 15k; r= 0. 08314 l bar mol-1 k-1: 5. 1 10-5, 2. 9 10-5, 0. 28, 2. 6 103, answer: b. Pure solids and liquids are ignored in keq. Conc. of a pure solid is solid/msolid = a constant. Only gases and substances in solution are included. [co 2 ][h 2 ] or k p pco. Kc [co2 ] or k p pco 2. Presence of solids and liquids necessary for equilibrium! Kc [co2 ] & k p pco2. Although keq includes only co2, equilibrium requires coexistence of all three components. Calculate kc or kp given certain initial and equilibrium concentrations or pressures.
