11:44 = O® OVO 4G .ill 17% expert.chegg.com/qr + 3 Chegg Hide student question Time Left: 01:58:18 Student question Estimate rH (750 K) for the reaction N2(g ) + H2(g) NH3(g) from the listed value of the standard enthalpy of formation of NH3(g) at 298 K in conjunction with the data on the temperature - dependence of heat capacities given in Table 2B.1. Skip Exit Submit Training

11:44 = O® OVO 4G .ill 17% expert.chegg.com/qr + 3 Chegg Hide student question Time Left: 01:58:18 Student question Estimate rH (750 K) for the reaction N2(g ) + H2(g) NH3(g) from the listed value of the standard enthalpy of formation of NH3(g) at 298 K in conjunction with the data on the temperature - dependence of heat capacities given in Table 2B.1. Skip Exit Submit Training

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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Hess's Law II Calculate A,H for the reaction, from the following information: 2 Ni(s) + 1/4 Sg(s) + 3 O₂(g) ----> 2 NISO3(s) NISO3(s) ----> NiO(s) + SO₂(9) 1/8 Sg(s) + O₂(g) ----> SO₂(g) Ni(s) + 1/2O₂(g) ----> NiO(s) AH 166.00 kJ AH = -247.00 kJ A,H= -251.00 kJ
Use Hess's law to Calculate the AH of the reaction C₂H₂(g) + H₂(g) → C₂H,(g) from the following data. Identify the "manipulation" for each reaction C₂H₂(g) + 3 O₂(g) → 2 CO₂(g) + 2 H₂O(1) C₂H₂(g) + 3% O₂(g) 2 CO₂(g) + 3 H₂O(1) H₂(g) + O₂(g) → H₂O(1) ΔΗ = -1411 kJ AH = -1560 kJ AH = -285.8 kJ
3. Heats of reaction can also be calculated using heats of formation and the relationship - AHrxn = ΣnAHƒ.prod — ΣmAHƒ.reac Substance HCl(aq) MgCl2(aq) MgO(s) H₂O(/) H.(kJ/mol) -167.2 -796.8 -601.2 -285.8 0 a. Standard State Elements Calculate the theoretical AH° values for the following reaction Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) MgO(s) + 2HCl(aq) → MgCl2(aq) + H2O(l) Mg(s) + O2(g) → MgO(s)
Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance A B с D H :0: H | || | H с C -C-H 174 H H H chemical symbol, chemical formula or Lewis structure H H H | | C I 1 I H H H (II | Ag - Ar - :O: -O-H boiling point (Choose one) (Choose one) ✓ (Choose one) (Choose one) ✓
Construct enthalpy cycles; use Hess's law and the enthalpy changes of formation below to calculate the enthalpy change for the reaction, CaCos(s) – ÇaQ(s) + CO2(g) AH, Cacoa(s) = -1207 kJmol-1 AH Cao(s) = -635 kJmol AH CO2(9) = -393 kJmol 1