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Unformatted text preview: ent to express equilibrium amounts of reactants and products in mo lar concentrations (molarit ies in mo l/L) Molarit y of H2S = Molarit y of H2 = ¾¾
2 H2S (g) ¬¾ 2 H2 (g) ¾ + S2 (g) Init ial
D Equilibrium Equilibrium Kc = Example 4: In the contact process, sulfuric acid is manufactured by first oxidizing SO2 to SO3, which is then reacted with water. The reaction of SO2 with O2 is: 2 SO2 (g) + O2 (g) ¾¾
¬¾ ¾ 2 SO3 (g) A 2.00 L flask was filled with 0.0400 mo l SO2 and 0.0200 mo l O2. At equilibrium, at 900 K, the flask contained 0.0296 mo l SO3. Obtain the value of Kc. Molarit y of SO2 = Molarit y of O2 = ¾¾
2 SO2 (g) + O2 (g) ¬¾ 2 SO3 (g) ¾ Init ial
D Equilibrium Equilibrium Kc = 8 Chemistry 102 Chapter 14 GASPHASE EQUILIBRIA (KP)
· GasPhase Equilibria refers to equilibrium systems where all reactants and products are gases.
· Concentrations of gases can be expressed in terms of partial pressures, since the concentration of a gas is proportional to its partial pressure. Constant at a given temperature n mol
P PV = nRT (
) = VL
RT n 1
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