Galena is the ore from which elemental lead is extracted. In the first step of the extraction process, galena (PbS) is heated in air to form lead(II) oxide.\[ 2 \text{PbS (s)} + 3 \text{O}_2\text{(g)} \rightarrow 2 \text{PbO (s)} + 2 \text{SO}_2\text{(g)} \quad \Delta H = -827.4 \, \text{kJ} \]What mass of galena (PbS) is converted to lead (II) oxide if 200 kJ of heat are produced?

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Answered: What mass of galena (PbS) is converted…

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter16: Spontaneity Of Reaction

Section: Chapter Questions

Problem 48QAP

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One way of obtaining pure sodium carbonate is through the decomposition of the mineral trona, Na,(CO,),(HCO,) 2H,0, Na,(Co,),(HCO,) 2H,0(s) → 5Na,cO,(s) + CO,(g) 3H,0(g) + When 1.00 metric ton (1 × 10° kg) of trona is decomposed, 0.74 metric ton of Na,co, is recovered. What is the percent yield of this reaction? Select one: a. 93% 19 b. 22% С. 83% d. 43% е. 17%
3. In a blast furnace, carbon monoxide (CO) is used to reduce ferric oxide (Fe,0,) to metallic iron, with carbon dioxide as a by-product. The equilibrium constant K, for the redox reaction is 19.9 at 1000 K. If the equilibrium pressure of CO, is 2.4 atm, how much pressure is exerted by CO? Fe,O,(s) + 3CO(9) = 2Fe(s) + 3CO,lg)
I just need to know if it is endothermic or exothermic?
Write the equilibrium constant for C(s) + 2H2(g) ↔ CH4(g)
Copper(I) ions in aqueous solution react with NH3 (aq) according to Cu+ (aq) + 2 NH3 (aq) · → Cu(NH3)2(aq) K₁ = 6.3 × 1010 Calculate the solubility (in g·L-¹) of CuBr(s) (Ksp = : 6.3 × 109) in 0.74 M NH3(aq). solubility of CuBr(s): g/L
Co(H2O)62* (ag) +CF(ag) = CoCl42-(ag) + H2O (1) a) Balance this equation and write the expression for the equilibrium constant for this reaction. Write the expression for the equilibrium constant for this reaction. b) If the concentrations of all species are 2.50M at 25°C and the equilibrium constant of the reaction at 25°C is Keq = 2.85 102, how will the reaction shift? Show calculations and explanation. c) Explain the effect of adding silver nitrate to the solution. How does it shift the reaction? Provide the ionic equation.
Given the equilibrium constants for the following reactions what is the equilibrium constant K. for the reaction 2 Cu (s) + O2 (g) 2 CuO (s)? 4 Cu (s) +O2 (g) 2 Cu20(s) K1 = 6.29 x 104 2 CuO (s) Cu,0(s) + ½ 02 (g) K2 = 17.3
Write the balanced net ionic equation for the reaction of aqueous sodium sulfate with aqueous lead(II) nitrate. Include phases. net ionic equation: Pb2+ (aq) + S²- (aq) PbS(s) Incorrect SPECIAL ΔΣΩ λμπ x"| Xo EX| (s) (1) || (aq) (g) () [] CLR
7. The solubility of AgCl in water at 25°C is 1.274 x 10³ mol dm³. On the assumption that the Debye-Hückel limiting law (DHLL) applies. a. Calculate AG for the process AgCl(s) → Ag (aq) +Cr (aq). b. Calculate the solubility of AgCl in an 0.01 M solution of K₂SO4.
8. A 2.856-g sample of limestone was analyzed for Fe, Ca, and Mg. The iron was determined as Fe;Os, yielding 0.04561 g. Calcium was isolated as CaSO4, yielding a precipitate of 1.487 g, and Mg was isolated as 0.1599 g of Mg;P2O7. Report the amount of Fe, Ca, and Mg in the limestone sample as %w/w FeO, %w/w CaO, and %w/w MgO.
b) Determine the standard enthalpy change and std. Gibbs free energy change of reaction at 400 k for the reaction СO(g) +2H2(g) — CHОН (g) At 298.15 K, AH.co (0)= -26.41 kcal/mol, AH AG.co (9)= -32.8079 kcal/mol, AG cH,oh(9)= -38.69 kcal/mol, °.CH20H(9)= -48.08 kcal/mol, The standard heat capacity of various components is given by, CO = a + bT + cT² + dT³, where C, is in cal/mol-K and T is in K b x10² с х105 d x10° Соmponent CH3OH а 4.55 2.186 -0.291 -1.92 CO 6.726 0.04 0.1283 -0.5307 H2 6.952 -0.0457 0.09563 -0.2079
18. From the following reacțions and thermal data at 25°C 3 2 Fe(s) +O:(g) 2 Fe,O:(s) ΔΗ - 196,500 cal %3D 1 2 FeO(s) + ; 0:(g) - Fe2O:(s) AH° = -67,900 cal Fe(s) + 2 H* (a = 1) = Fe++ (a = 1) + H2(g) AH° = -21,000 cal %3D %3D 1 H:(g) H* (a = 1) AHº = 0 cal %3D Hig) +0:(g) = H;0(1) AH° = -68,320 cal %3D calculate AH° of the reaction: FeO(s) + 2 H+ (a = 1) = H;0(1) + Fe++ (a = 1) %3D

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