Prelaboratory Questions Name Laboratory Section 1. Consider the reaction below. Co(H;O),?+ (aq) + 4 Cl (aq) COC1,? (aq) + 6 H2O (1) The equilibrium constant expression (K) of the reaction does not include the concentra- tion of H2O even though the reaction produces six moles of water. Explain. 2. In the following reaction, NO2 is a brown gas and N,O4 is colorless. NO2 (g) (brown) = 2 N,O4 (g) (colorless) a) When the temperature decreases, the color of the equilibrium mixture gets lighter. Is this reaction exothermic or endothermic? b) What will happen to the value of the equilibrium constant, K, if the temperature of the reaction is increased? (continued on next page) 193

Chemistry for Engineering Students
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Chapter12: Chemical Equilibrium
Section: Chapter Questions
Problem 12.11PAE
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Prelaboratory Questions
Name
Laboratory Section
1. Consider the reaction below.
Co(H;O),?+ (aq) +
4 Cl (aq)
COC1,? (aq) + 6 H2O (1)
The equilibrium constant expression (K) of the reaction does not include the concentra-
tion of H2O even though the reaction produces six moles of water. Explain.
2. In the following reaction, NO2 is a brown gas and N,O4 is colorless.
NO2 (g)
(brown)
= 2 N,O4 (g)
(colorless)
a) When the temperature decreases, the color of the equilibrium mixture gets lighter. Is
this reaction exothermic or endothermic?
b) What will happen to the value of the equilibrium constant, K, if the temperature of
the reaction is increased?
(continued on next page)
193
Transcribed Image Text:Prelaboratory Questions Name Laboratory Section 1. Consider the reaction below. Co(H;O),?+ (aq) + 4 Cl (aq) COC1,? (aq) + 6 H2O (1) The equilibrium constant expression (K) of the reaction does not include the concentra- tion of H2O even though the reaction produces six moles of water. Explain. 2. In the following reaction, NO2 is a brown gas and N,O4 is colorless. NO2 (g) (brown) = 2 N,O4 (g) (colorless) a) When the temperature decreases, the color of the equilibrium mixture gets lighter. Is this reaction exothermic or endothermic? b) What will happen to the value of the equilibrium constant, K, if the temperature of the reaction is increased? (continued on next page) 193
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