HW Key _10 S problems part b

# HW Key _10 S problems part b - S34 For Hg gas Cp = 5/2 R...

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S34. For Hg gas, C p = 5/2 R, calculate Δ H for the process Hg (g, 1 atm, 800 K) Hg (g,1 atm, 1000 K). Because this is a constant pressure process, H = Q . Δ H = C p dT T 1 T 2 = 5 2 R ( T 2 T 1 ) = 5 2 8.3151 J/mol K (1000 800 K) = 4.16 J/mol S35. Δ H for the reaction A B is 2000 cal (4.184 cal = 1 J) at 300 K. Calculate Δ H for this reaction at 400 K. C p = 5 cal/K-mole for A and 20 cal/K-mole for B.

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S36. Calculate the heat of formation for 1 mole of HI (g) from the following data a) H 2 (g) + Cl 2 (g) 2 HCl(g) Δ H = -44.20 kcal b) HCl(g) + H 2 O HCl(aq) Δ H = -18.31 kcal c) HI(g) + H 2 O HI(aq) Δ H = -19.21 kcal d) KOH(aq) + HCl(aq) KCl(aq) Δ H = -13.74 kcal e) KOH(aq) + HI(aq) KI(aq) Δ H = -13.67 kcal f) Cl 2 (g) + 2KI(aq)
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