N2 (9) + 3H2 (9) + 2NH3 (9) does favor formation of products at room temperature but does not favor formation of products at a much higher temperature. What can you conclude from this about the signs of AH° and AS", assuming that the enthalpy and entropy changes are not greatly affected by the temperature change? (Select all that apply.) OAH° must be negative O AS must be positive O AS must be equal to zero O AH° must be equal to zero OAH° must be positive O AS must be negative

N2 (9) + 3H2 (9) + 2NH3 (9) does favor formation of products at room temperature but does not favor formation of products at a much higher temperature. What can you conclude from this about the signs of AH° and AS", assuming that the enthalpy and entropy changes are not greatly affected by the temperature change? (Select all that apply.) OAH° must be negative O AS must be positive O AS must be equal to zero O AH° must be equal to zero OAH° must be positive O AS must be negative

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Q3
Consider the following reaction under standard conditions, in which DHo and DSo are given. CO(g) + 2H2(g) --> CH3OH(g); DHo = -90.5 kJ, and DSo = -219.2 J/K What is DGo if the reaction is carried out at 250oC under standard conditions? Is the reaction spontaneous under this condition? (A) DGo = -35.7 kJ; the reaction is spontaneous (B) DGo = 145.3 kJ; the reaction is not spontaneous (C) DGo = -205.1 kJ; the reaction is spontaneous (D) DGo = 24.1 kJ; the reaction is not spontaneous
Compound SO; (g) SO₂ (g) NH3 (g) NO (g) H₂O (9) Consider the following reaction at 25 °C: 5 SO3(g) + 2 NH³(g) → 2 NO(g) + 5 SO₂(g) + 3 H₂O(g) Given the information in the table, calculate AH° for the reaction. AHf (kJ/mol) -396 -297 -46 90.4 -241.8 Sf (J/mol-K) 256 248 192.5 210.6 188.7
Using H° data, calculate the standard enthalpy change for the reaction at 298K. 2 NH3(g) HNO3(aq) --> NO2(g) 2 H20(1) AH° (KJ/mol) -46.19 -206.6 33.84 -285.83 (Note: the table AH values are located directly below the corresponding compound, this is the number found in the Appendix)
c) SO d) CO 0. Sodium reacts violently with water according to the equation: 2 Na(s) +2 H;0() 2 NaOH(aq) + H:(g) resulting solution has a higher temperature than the water prior to the addition of sodium. What are the signs of AH and AS for this reaction? a) AH is negative and AS is negative. b) AH is negative and AS is positive. e) AH is positive and AS is negative. d) AH is positive and AS is positive. (END)
Calculate ΔH° in kilojoules for the following reaction, the preparation of the unstable nitrous acid, HNO2. Use the following thermochemical equations:
Gasoline is composed primarily of hydrocarbons, includingmany with eight carbon atoms, called octanes. One ofthe cleanest–burning octanes is a compound called 2,3,4-trimethylpentane, which has the following structural formula: The complete combustion of one mole of this compoundto CO21g2 and H2O1g2 leads to ΔH° = -5064.9 kJ.(a) Write a balanced equation for the combustion of1 mol of C8H181l2. (b) By using the information inthis problem and data in Table 5.3, calculate ΔHf° for2,3,4-trimethylpentane.