EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
4th Edition
ISBN: 9781119192107
Author: BULLARD
Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT
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Textbook Question
Chapter 6, Problem 6.45P
Sulfur trioxide (SO3) dissolves in and reacts with water to form an aqueous solution of sulfuric acid (H2SO4). The vapor in equilibrium with the solution contains both SO3 and H2O. If enough SO3 is added, all of the water reacts and the solution becomes pure H2SO4. If still more SO3 is added, it dissolves to form a solution of SO3 in H3SO4, called oleum or fuming sulfuric acid. The vapor in equilibrium with oleum is pure SO3. Twenty percent oleum by de?nition contains 20 kg of dissolved SO3 and 80 kg of H2SO4 per hundred kilograms of solution. Alliteratively, the oleum composition can be expressed as % SO3 by mass, with the constituents of the oleum considered to be SO3 and H2O.
(a) Prove that a 15.0% oleum contains 84.4% SO3.
(b) Suppose a gas stream at 40°C and 1.2 atm containing 90 mole% SO3 and 10% N2 contacts a liquid stream of 98 wt% H2SO4 (aq), producing 15% oleum. Tabulated equilibrium data indicate that the partial pressure of SO3 in equilibrium with this oleum is 1.15 mm Hg. Calculate (i) the mole fraction of SO3 in the outlet gas if this gas is in equilibrium with the liquid product at 40°C and 1 atm, and (ii) the ratio (m3 gas feed)/(kg liquid feed).
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50.0 g of N2O4 is introduced into anevacuated 2.00 L vessel and allowed to come to equilibrium
with its decomposition product, N2O4(g) 2NO2(g). For this reaction Kc= 0.133. Once the
system has reached equilibrium, 5.00 g of NO2 isinjected into the vessel, and the system is
allowed to equilibrate once again. Calculate the mass ofNO2 in the final equilibrium mixture.
Suppos
constants for the two reactions
XeF(g) + H2O(g) = XeOF4(g) + 2 HF(g)
XeO4(g) + XeF,(g) 2 XeOF4(g) + XeO3F2(g)
Give the equilibrium constant for the reaction
XeO4(g) + 2 HF(g) = XeO3F2(g) + H2O(g)
Chapter 6 Solutions
EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
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