Predict the order of the following reactions in terms of increasing ΔS:
(a)
(c)
(d)
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Student Solutions Manual For Masterton/hurley's Chemistry: Principles And Reactions, 8th
- For the following reaction C(s)+2H2(g)CH4(g) K=0.26 at 1000C (3 significant figures). What is the equilibrium constant at 750C (3 significant figures)?arrow_forwardCobalt(II) chloride hexahydrate, CoCl26H2O, is a bright pink compound, but in the presence of very dry air it loses water vapor to the air to produce the light blue anhydrous salt CoCl2. Calculate the standard free-energy change for the reaction at 25C: CoCl26H2O(s)CoCl2(s)+6H2O(g) Here are some thermodynamic data at 25C: What is the partial pressure of water vapor in equilibrium with the anhydrous salt and the hexahydrate at 25C? (Give the value in mmHg.) What is the relative humidity of air that has this partial pressure of water? The relative humidity of a sample of air is Relativehumidity=partialpressureofH2O(g)inairvaporpressureofwater100 What do you expect to happen to the equilibrium partial pressure over the hexahydrate as the temperature is raised? Explain.arrow_forwardMonochloroethane (C2H5Cl) can be produced by the direct reaction of ethane gas (C2H6) with chlorine gas or by the reaction of ethylene gas (C2H4) with hydrogen chloride gas. The second reaction gives almost a 100% yield of pure C2H5Cl at a rapid rate without catalysis. The first method requires light as an energy source or the reaction would not occur. Yet G for the first reaction is considerably more negative than G for the second reaction. Explain how this can be so.arrow_forward
- Silicon forms a series of compounds analogous to the al-kanes and having the general formula SinH2n+2. The first of these compounds is silane, SiH4, which is used in the electronics industry to produce thin ultrapure silicon films. SiH4(g) is somewhat difficult to work with because it is py-ropboric at room temperature—meaning that it bursts into flame spontaneously when exposed to air. (a) Write an equation for the combustion of SiH4(g). (The reaction is analogous to hydrocarbon combustion, and SiO2 is a solid under standard conditions. Assume the water produced will be a gas.) (b) Use the data from Appendix E to calculate ? for this reaction. (c) Calculate G and show that the reaction is spontaneous at 25°C. (d) Compare G for this reaction to the combustion of methane. (See the previous problem.) Are the reactions in these two exercises enthalpy or entropy driven? Explain.arrow_forwardConsider the following numbered processes: A → 2B B → 2C + D E → 2D ΔH for the process A → 4C + E is sdarrow_forwardFor the following reaction, - Δ[C6H14]/Δt was found to be 6.2 x 10-3 M/s. C6H14(g) --> C6H6(g) + 4H2(g) Determine Δ[H2]/Δt for this reaction at the same time. Select one: a. 1.6 x10-3 M/s b. -1.6 x 10-3 M/s c. 6.2 x 10-3 M/s d. 2.5 x 10-2M/sarrow_forward
- Which of the following statements are TRUE?(1) Reactions with more negative values of △G0 are spontaneous and proceed at a higher rate than those with less negative values of △G0.(2) The activation energy, Ea, is usually about the same as △H for a reaction.(3) The activation energy for a reaction does not change significantly as temperature changes.(4) Reactions usually occur at faster rates at higher temperatures. (A) 1, 2, 3, 4 (B) 3, 4 (C) 1, 2, 4 (D) 2, 3, 4 (E) 1, 2, 3arrow_forwardChemical reaction. Use data to Answer.arrow_forwardGiven: Ea= 790 J/mol A=4.9x10^10 1/M*s Determine Eyring parameters ∆S‡ and ∆H‡ for this reaction at 240 Karrow_forward
- Enter your answer in the provided box. The rate constant for the following elementary reaction is 6.1 x 10° M's at 25°C: -1 2A(g) +B(g) → 2C(g) AG° (kJ/mol) A 84.752 BO C 54.064 What is the rate constant for the reverse reaction at the same temperature?arrow_forward15.Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 87 ∘C∘C , where [Fe2+]=3.00mol L−1[Fe2+]=3.00mol L−1 and [Mg2+]=0.310mol L−1[Mg2+]=0.310mol L−1 . a)What is the value for the reaction quotient, Qb) What is the value for the temperature, TT c)What is the value for nn d)Calculate the standard cell potential for Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)arrow_forwardI get using the Arrhenius equation but even after calculating the e-[82.64 KJ/mol)/(8.314 J/mol.K × 346.63 K)] it doesn't equal up to 3.518× 10-13 s-1. Where did it come from if it didn't from from just that?arrow_forward
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