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6.72 Write the balanced overall equation (equation 3) for the following process, calculate AHoverall, and match the number of each equation with the letter of the appropriate arrow in Figure P6.72: AH = 180.6 kJ (1) N2(g) + 02(g) (2) 2NO(g) + 02(g) → 2NO2(g) AH= -114.2 kJ → 2NO(g) %3D (3) AHoverall = ?

6.72 Write the balanced overall equation (equation 3) for the following process, calculate AHoverall, and match the number of each equation with the letter of the appropriate arrow in Figure P6.72: AH = 180.6 kJ (1) N2(g) + 02(g) (2) 2NO(g) + 02(g) → 2NO2(g) AH= -114.2 kJ → 2NO(g) %3D (3) AHoverall = ?

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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6.68 What is the main application of Hess's law? 6.69 When carbon burns in a deficiency of O2, a mixture of CÓ and CO, forms. Carbon burns in excess O2 to form only CO2, and CÓ burns in excess O2 to form only CO2. Use AH values of the latter two reactions (from Appendix B) to calcu- late AH for equation kJ C(graphite) + 02(g) MgO? O? → CO(g) Skill-Building Exercises (grouped in similar pairs) 6.70 Calculate AH for Ca(s) + 02(8) + CO2(8) 9 kJ of uation. ents? CACO3(s) given the following reactions: Ca(s) + 02(g) СаО (s) AH = -635.1 kJ 4 kJ of CACO3(s) CaO(s) + CO2(g) AH= 178.3 kJ ation. ts? 6.71 Calculate AH for 2NOCI(g) → N2(8) + O2(g) + Cl2(g) given the following reactions: many N2(g) + 02(8) NO(8) + Cl2(g) NO(g) AH = 90.3 kJ > NOCI(g) AH = -38.6 kJ s? 6.72 Write the balanced overall equation (equation 3) for the following process, calculate AHoverall, and match the number of each equation with the letter of the appropriate arrow in Figure P6.72: heir re- rane → 2NO(g) 2NO2(g) AH = -114.2 kJ AHoverall 180.6 kJ (1) N2(8) + O2(g) (2) 2NO(g) + O2(8) ΔΗ- > - kJ (3) = ? 6.73 Write the balanced overall equation (equation 3) for the fol- lowing process, calculate AHoverall, and match the number of each equation with the letter of the appropriate arrow in Figure P6.73: 4PC13(8) AH = -1148 kJ 4PCI5(g) AH = -460 kJ res The (1) P4(s) + 6Cl2(g) (2) 4PCI3(8) + 4C1½(g) AHoverall = ? %3D (3)
Transcribed Image Text:6.68 What is the main application of Hess's law? 6.69 When carbon burns in a deficiency of O2, a mixture of CÓ and CO, forms. Carbon burns in excess O2 to form only CO2, and CÓ burns in excess O2 to form only CO2. Use AH values of the latter two reactions (from Appendix B) to calcu- late AH for equation kJ C(graphite) + 02(g) MgO? O? → CO(g) Skill-Building Exercises (grouped in similar pairs) 6.70 Calculate AH for Ca(s) + 02(8) + CO2(8) 9 kJ of uation. ents? CACO3(s) given the following reactions: Ca(s) + 02(g) СаО (s) AH = -635.1 kJ 4 kJ of CACO3(s) CaO(s) + CO2(g) AH= 178.3 kJ ation. ts? 6.71 Calculate AH for 2NOCI(g) → N2(8) + O2(g) + Cl2(g) given the following reactions: many N2(g) + 02(8) NO(8) + Cl2(g) NO(g) AH = 90.3 kJ > NOCI(g) AH = -38.6 kJ s? 6.72 Write the balanced overall equation (equation 3) for the following process, calculate AHoverall, and match the number of each equation with the letter of the appropriate arrow in Figure P6.72: heir re- rane → 2NO(g) 2NO2(g) AH = -114.2 kJ AHoverall 180.6 kJ (1) N2(8) + O2(g) (2) 2NO(g) + O2(8) ΔΗ- > - kJ (3) = ? 6.73 Write the balanced overall equation (equation 3) for the fol- lowing process, calculate AHoverall, and match the number of each equation with the letter of the appropriate arrow in Figure P6.73: 4PC13(8) AH = -1148 kJ 4PCI5(g) AH = -460 kJ res The (1) P4(s) + 6Cl2(g) (2) 4PCI3(8) + 4C1½(g) AHoverall = ? %3D (3)
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