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Exam4--Fall1998

# Exam4--Fall1998 - C HEMISTRY1 3O FORM FALL1 998 FINAL E XAM...

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" E f Page1 1) Given K1 for reaction(1) and K2 for reaction reaction (3), at the same temperature. A) B) E) K1/K2 2) At 700 K, K = 0.125 M for the reaction: c(s) + coz (s) i: 2 CO (g) Into a 1.0L flask, ( at 700 K) are placed 0.30 moleof C(s), 2.0 moleof COz (g) , and 0 28 mole of CO (g) Which one of the following statements is true? A) This system is initially at equilibrium. B) None of the above statements are true. C) Net reaction will not change the number of moles of solid C(s). Di Net reaction wrll increase the number of molesof CO (g) Ej Net reaction will increase the number of molesof COz (g) 3) A 1.0 L box was filled withI moles of SOz (g), 3 moles of NO2(g) 2 moles of SOs (g) and 1 mote of NO (g) The reactron was allowed io reacn equilibrium. At equilibrium, 6 moles of SOz (g) weie found- What is G for the reaction? 2 NOz (g) * NrO4 (g) Kr = 10.9 2 N2O (g) * g Oz (g) ? 2 NzO4 2 NOz(g) * t',tto (g) * glZ Oz (g) K' (Kz)t" Kr Kz Soz (g) + Noz (9) = A) Yw=2 B) K is between 1 and 2 C) G is smaller than 1 D ) G = 1 E) lQ is larger than 2 c) ( Kl)1/2 K2 D) K2lK1 SOr (g) + t'lO (9) Kz= 1'2 + 2 N z O a ( g ) K s = ? <_ Form 3 (2) at a particular temperature' Determine K3 for -46-
Page 2 4) Consider the following endothermic reaction with 2 COz (g) -t2 CO(s) + oz (9) <_ Which of the following will produce an increase in the quantity of CO2 (g) at equilibrium?

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