(a)
Interpretation:
The value of
Concept introduction:
The standard enthalpy of formation can be defined as the energy change during the formation of one mole of substance from its constituent elements in their standard state. It is denoted as
(b)
Interpretation:
The value of
Concept introduction:
The standard enthalpy of formation can be defined as the energy change during the formation of one mole of substance from its constituent elements in their standard state. It is denoted as
(c)
Interpretation:
The value of
Concept introduction:
The standard enthalpy of formation can be defined as the energy change during the formation of one mole of substance from its constituent elements in their standard state. It is denoted as
(d)
Interpretation:
The value of
Concept introduction:
The standard enthalpy of formation can be defined as the energy change during the formation of one mole of substance from its constituent elements in their standard state. It is denoted as
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Chapter 22 Solutions
General Chemistry: Principles and Modern Applications (11th Edition)
- 9.10 The kinetic energy of molecules is often used to induce chemical reactions. The bond energy in an O1 molecule is 8.221019J . Can an O2 molecule traveling at 780 m/s provide enough energy to break the O = O bond? What is the minimum velocity of an O2 molecule that would give a kinetic energy capable of breaking the bond if it is converted with 100% efficiency?arrow_forwardConstruct a Born–Haber cycle for the formation of the hypotheticalcompound NaCl2, where the sodium ion has a 2+charge (the second ionization energy for sodium is given inTable 7.2). (a) How large would the lattice energy need to befor the formation of NaCl2 to be exothermic? (b) If we wereto estimate the lattice energy of NaCl2 to be roughly equalto that of MgCl2 (2326 kJ/mol from Table 8.1), what valuewould you obtain for the standard enthalpy of formation,ΔHf°, of NaCl2?arrow_forwardMatch the term to the description Example: 7.__j__arrow_forward
- Consider following reaction: HgO (s) -> Hg(l) + ½ O2 (g) Delta H = +90.7 kj/mol. What quantity of heat in kj/mol is required to produce one mole HgO? Write your answer without units. Given the following data 2ClF(g) + O2(g) --> Cl2O(g) + F2O (g) Delta H= 167.4 kJ I 2ClF3(g) + 2O2(g) --> Cl2O(g) + 3F2 O (g) Delta H= 341.4 kJ II 2 F2(g) + O2(g) ---> 2F2O (g) Delta H= -43.4 kJ III Calculate the delta H in kJ for below reaction: ClF(g) + F2(g) ---> ClF3(g)arrow_forwardThe attractive force between two ions in Na20, Fc is 8.64x10-9N. What is the bond length a0 (in nm) given that valence of the charged Na+ is Z1=+1, for O-, is Z2 =-2, the charge of a single electron q is 0.16x10-18 C and the proportionality constant k0=9x109 V.m/C? Note that K=k0(Z1q)(Z2q) and that 1 V.C = 1 J.arrow_forwardBond dissociation enthalpy of F2is less than that of Cl2. Why?arrow_forward
- H2 has equilibrium bond length of 0.751 Å and bond dissociation energy of 432 kJ mol21, whereas F2 has equilibrium bond length of 1.417 Å and bond dissociation energyof 155 kJ mol21. On the same graph show qualitativesketches of the effective potential energy curve Veff for anH2 and an F2 molecule. In your solution, show the conversion from kJ mol21to the energy of a single molecule.1arrow_forwardUse the data found in Thermodynamic Properties to determine the values for the O-Cl and the O-F bond energies. (heats of formation of OF2 and OCl2 are 24.7 and 80.37 kJ/mol, respectively). Please see https://youtu.be/-OKWJ0LYdNc for assistance. DO-F kJ/mol DO-Cl kJ/molarrow_forwardEstimate ΔrH° for forming 2 mol ammonia from molecular nitrogen and molecular hydrogen. Is this reaction exothermic or endothermic?arrow_forward
- The heat of neutralization, Hneut, can be defined as the amount of heat released (or absorbed), q, per mole of acid (or base) neutralized. Hneut for nitric acid is -52 kJ/mol HNO3. At 27.3C, 50.00 mL of 0.743M HNO3 is neutralized by 1.00 M Sr(OH)2 in a coffee-cup calorimeter. (a) How many mL of Sr(OH)2 were used in the neutralization? (b) What is the final temperature of the resulting solution? (Use the assumptions in Question 11.)arrow_forwardThe bond energy for a CH bond is about 413 kJ/mol in CH4 but 380 kJ/mol in CHBr3. Although these values are relatively close in magnitude, they are different. Explain why they are different. Does the fact that the bond energy is lower in CHBr3, make any sense? Why?arrow_forward9.46 The heat of fusion of pure silicon is 43.4 kJ/mol. How much energy would be needed to melt a 5.24-g sample of silicon at its melting point of 1693 K?arrow_forward
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