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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- Octane is typical of the components of gasoline. Estimate (a) the entropy of vaporization of octane, which boils at 126 °C at 1 atm.
Entropy (a) = ________ J/K/mol. 3 sig. figures.
Octane is typical of the components of gasoline. Estimate (b) the enthalpy of vaporization of octane, which boils at 126 °C at 1 atm.
Enthalpy (b) = _______ kJ/mol. 3 sig. figures
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- For the reactionNH4NO3(aq) N2O(g) + 2 H2O(l)G° = -175.3 kJ and H° = -149.6 kJ at 257 K and 1 atm.This reaction is (reactant, product) favored under standard conditions at 257 K.The entropy change for the reaction of 1.74 moles of NH4NO3(aq) at this temperature would be J/K.arrow_forwardWhat is the total entropy change at 25oC for the reaction below, if the standard entropies of reactants and products are So (C(gr)) = 5.74 J/mol*K, So (H2(g)) = 130.68 J/mol*K, and So (C7H16(g)) = 426.3000 J/mol*K and the heat of formation of C7H16(g)) is -187.9000 kJ/mol.7C(gr) + 8H2(g) ↔ C7H16(g)a) ΔSototal = -659.320 Jb) ΔSototal = 28.783 Jc) ΔSototal = -28.783 Jd) ΔSototal = 659.320 Jarrow_forwardCalculate the change in the molar entropy of solid sodium chloride at constant pressure (1.00 bar) during heating from 0°C to 400°C. The constant-pressure molar heat capacity of NaCl(s) – which is not constant - takes the following form. 45.94 J 16.32 x 10-3 J T. Cp,m3 K mol K2 molarrow_forward
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