CHMA11H3 Lecture Notes - Lecture 1: Thermodynamic Equilibrium, Equilibrium Constant, Rice Chart

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CHMA11H3 Full Course Notes

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What is the equilibrium constant kfinal for the following reaction? (kfinal or k3 = k1*k2) Given the two reactions: h2s(aq) hs (aq)+h+(aq), k1 = 9. 36 10 8, hs (aq) s2 (aq)+h+(aq), k2 = 1. 04 10 19, Therefore k1 will become k1 (take the 1/k of the reaction): k1 = 1. 07 107. Thermodynamic equilibrium constant k of 3860 bar2 is 3860. Reaction quotient, q (solids and liquids equal 1) Initially, only a and b are present, each at 2. 00 mol l 1. What is the final concentration of a once equilibrium. Bronsted-lowry acids: has h in the beginning and n in the formula. Bronsted-lowry bases: has c , h , and n in the formula but does not start with h . Conjugate acid of a base has one extra h ion in the formula: Amphoterism: a substance that can act as either an acid or base (hso4-)

Related Questions

Â± Relating Different Forms of the Equilibrium Constant

For chemical reactions where all reactants and products are in the gas phase the amount of each gas in the vessel can be expressed either as partial pressures or as concentrations. As such the equilibrium constant for a gas phase reaction can also be expressed in terms of concentrations or pressures. For the general reaction,

aA(g)+bB(g)âcC(g)+dD(g)

Kp=(PC)c(PD)d(PA)a(PB)b and Kc=[C]c[D]d[A]a[B]b.

It is possible to interconvert between Kp and Kc using

Kp=Kc(RT)În

where R=0.08314 L bar molâ1 Kâ1 and În is the difference in stoichiometric coefficients between gaseous products and gaseous reactants.

If we assume that the gaseous reactant and products are âidealâ and the partial pressures of the reactants and products were expressed in bar, then the thermodynamic equilibrium constant, K is the magnitude (or numerical value) of Kp.

Part A

For the reaction

2CH4(g)âC2H2(g)+3H2(g)

Kc=0.160 mol2 Lâ2 at 1621 âC. What is Kp for the reaction at this temperature?

Enter your answer numerically.

Part B

For the reaction

N2(g)+3H2(g)â2NH3(g)

Kp=3.80Ã10â3 barâ2 at 265 âC. What is Kc for the reaction at this temperature?

Enter your answer numerically.

CHMA11H3 Lecture Notes - Lecture 1: Thermodynamic Equilibrium, Equilibrium Constant, Rice Chart

CHMA11H3 Full Course Notes

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