Bond Energy Activity

An ionic bond forms when _________.a. atoms share electronsb. positively charged and negatively charged parts ofcovalent molecules attractc. ions with opposite electrical charges attractd. two atoms exchange protons

After writing and balancing the equation, what is the next step in using bond energies to calculate the enthalpy of a reaction? A. write the structures of the products and reactants B. Sum the bond energies of the products C. Write down the bond energies for the products and reactants D. Subtact the bond energies of the products from the reactants

Study the graph above. In terms of bond energy, which statement is TRUE regarding the energy involved in breaking and making bonds

In order to break a covalent bond, what direction must energy flow? A. Energy is neither released or absorbed because energy cannot be created or destroyed  b. Energy is absorbed from the surrounding to the system  c. Energy is released from the system to the surroundings  d. Energy may be released or absorbed depending on the polarity of the covalent bond.

Study the graph above. In terms of bond energy, which statement is TRUE regarding the energy involved in breaking and making bonds

Consider the following hypothetical reaction XY + Z → XZ + Y + 20 kJ What bond is being broken?  Breaking this bond requires energy/releases energy (circle one). What bond is being formed?  Forming this bond requires energy/releases energy (circle one). What is the sign for the change in enthalpy of this reaction? Based on the enthalpy, what relationship can you draw between the energy of the bonds breaking and the energy of bonds forming in this reaction? The energy needed to break an XY bond is 70 kJ. What is the energy produced when an XZ bond forms?

Which of the following is not shown on an energy reaction coordinate diagram? O The energy released by the system to form bonds. O The number of bonds broken and made. O The net energy change of the reaction. O The energy going into the system to break the bonds. • Previous

H-X HF HCI HBr HI ΔΗ (kJ mol-¹) -13 -59 -63 -57

Please help answer part d and e

16. Use the following decomposition reaction to answer the following questions: 2H,0(g) + heat→ 2H;(g) + O,(g) a. Is this reaction Endothermic or Exothermic and how do you know? b. When I decomposed water the temperature rose from 19°C to 26°C. Is this is an endothermic reaction? Explain.

18. Which of the following statements in regards to the reaction coordinate diagram is true? A.It takes more energy to break the old bonds than energy is released in forming new bonds, resulting in an exothermic reaction. B.It takes less energy to break the old bonds than energy is released in forming new bonds, resulting in an exothermic reaction. C.It takes more energy to break the old bonds than energy is released in forming new bonds, resulting in an endothermic reaction. D.It takes less energy to break the old bonds than energy is released in forming new bonds, resulting in an endothermic reaction.

For the reaction below: CH3CH2-H CH,CH2 •OH H-OH a. Estimate the gas phase enthalpy change using bond dissociation enthalpies from the OWL Table Reference, not data from your text. Click the References button and then click the Tables link on the drop-down that appears. Include algebraic sign and units. b. Is the reaction exothermic or endothermic? c. Is the reaction likely to proceed spontaneously in the direction written? Submit Answer Retry Entire Group No more group attempts remain

For the reaction below: CH₂ + Cl₂ CH₂-CI + H-CI a. Estimate the gas phase enthalpy change using bond dissociation enthalpies from the OWL Table Reference, not data from your text. Click the References button and then click the Tables link on the drop-down that appears. Include algebraic sign and units. b. Is the reaction exothermic or endothermic? c. Is the reaction likely to proceed spontaneously in the direction written?

For the reaction below: H O". CI. H-CI a. Estimate the gas phase enthalpy change using bond dissociation enthalpies from the OWL Table Reference, not data from your text. Click the References button and then click the Tables link on the drop-down that appears. Include algebraic sign and units. b. Is the reaction exothermic or endothermic? Ⓒ c. Is the reaction likely to proceed spontaneously in the direction written?

A difference in _________ results in a polar bond between two atoms.

Bond______________ is a measure of how equally or unequally the electrons in a covalent bond are shared

Which statement describes the relationship between reactants and products in an exothermic reaction? a. The products have more bond energy and are less stable than the reactants. b. The reactants have more bond energy and are more stable than the products. c. The products have more bond energy and are more stable than the reactants. d. The reactants have more bond energy and are less stable than the products. I

26. When a mixture of hydrogen and bromine is maintained at normal atmospheric pressure and heated above 200°C in a closed container, the hydrogen and bromine react to form hydrogen bromide and a gas-phase equilibrium is established. a) Write a balanced chemical equation for the equilibrium reaction. b) Use bond enthalpies to estimate the enthalpy change for the reaction. c) Based on your answers to parts (a) and (b), which is more important in determining the position of this equilibrium, the entropy effect or the energy effect? d) In which direction will the equilibrium shift as the temperature increases above 200°C? Explain. e) Suppose that the pressure were increased to triple its initial value. In which direction would the equilibrium shift? f) Why is the equilibrium not established at room temperature?

Bond Type C - H 0=0 O-H C=O Energy (kJ/mol) 413 495 463 799 1. Using the bond energies given in the table, determine the total bond energy of the reactant molecules, 1 mole of CH4 and 2 moles of O2, in kilojoules (kJ). Upload an image of your response by clicking "Upload files" or by dragging and dropping your file into the box. Or use your device's camera to take a photo of your work by clicking the camera icon. ↑ T m + Upload files Supported file formats: PDF, JPG, PNG, RTF, TXT, ZIP, Word, Excel, Publisher, Open Office 0/3 File Limit

Chemistry: Bonding 4a. Draw the Lewis structure for CH4, (methane), NH3, (ammonia), and H20 (water). b. Calculate the bond polarity for the C-H bond, N-H bond, and O-H bond. c. Classify these molecules as either polar or nonpolar. If the molecule is polar, label the partial negative and partial positive sides of the molecules you drew above.

1. A bond in which an electron pair is shared unequally is called a(n) a. ionic bond b. covalent bond c. polar covalent bond d. co-ordinate covalent bond 2. A measure of an atom's ability to attract electrons in a covalent bond is called a. electron affinity b. electropositivity c. electronegativity d. valence activity 3. Electrons that are found in the outermost shell of an atom are called a. lone pair electrons b. Lewis electrons C. active electrons d. valence electrons 4. An atom that possesses more electrons than protons is called a(n) a. proton b. anion C. cation d. polyatomic ion A compound that, when dissolved in water, produces a solution that conducts electricity is called a(n) 5. a. covalent compound b. electrolyte c. polar covalent compound d. molecule 6. Which of the following compounds contain(s) ionic bonds? a. b. CH, С. СО. d. CaCl, Use the following choices for questions 7 to 12 a. synthesis b. decomposition c. single displacement d. double displacement 7. CaO ) + CO2…

21.! A) Atoms combine to form molecules because the energy of the molecule is lower than the energy of the free ! Which statement A-D about chemical bonds is NOT correct? atoms. B) The electrostatic potential energy explains why atoms bond together C) The electrostatic potential energy is directly proportional to the charges on two particles. D) The electrostatic potential energy is inversely proportional to the distance between two charged particles. E) Statements A-D are all correct 22. ) How many valence electrons are there in PO43? a) 10 c) 29 b) 14 d) 32