PDF-Chemistry Handout 3/31/2008 Bond Enthalpy Tables

Table of Bond Enthalpies kJmole at 25. Unit 1 – Chemical Changes and Structure. Controlling Rate. Factors Affecting Reaction Rate. Particle Size. The smaller the particle size, the greater the surface area, and the faster the reaction. Concentration. IB Topics 5 & 15. PART . 2: Calculating . . H via . Bond . Enthalpies & Hess’s Law. Above: thermit rxn. BOND ENTHALPIES. Enthalpy change (. . H) can also be calculated directly from bond enthalpies. - . Inorganic Chemistry. - . Spring 2015. Instructor:. Tom Mallouk Office hours TR 1:30-2:30 PM. 205 S. Frear Lab. Cell phone: 814-571-6115 Office phone: 814-863-9637. 12.1 Types of Enthalpy Change . 12.2 Born-Haber Cycles. 12.3 Enthalpy Changes – Enthalpy of Solution. 12.4 Mean Bond Enthalpy. 12.5 Entropy. 12.1 Enthalpy Change – Ionic Compounds. Learning Objectives:. Thermodynamics. is the study of energy and how it is interconverted.. First law of thermodynamics. – energy cannot be created or destroyed; it can only be converted from one form to another (. law of conservation of energy. Bonds and Energy. Breaking chemical bonds . requires. energy. Forming chemical bonds . releases. energy. The amount of energy required or released for a chemical process depends on the number and types of bonds that are formed and broken. PROPERTIES OF. NITROGEN. OCCURRENCE OF NITROGEN. . Molecular nitrogen comprises 78% by volume of the atmosphere .in the earth’s crust ,it occurs as sodium nitrate ,(called Chile saltpetre ) and potassium nitrate (Indian saltpetre ). It is found in the form of proteins in plants and animals .. Reaction Energies. In our earlier discussions of calorimetry, we used . physical. sources of heat (hot metal slug). It is also possible to use . chemical. sources of heat (like hot packs and cold packs).. Chapter. 4. Thermochemistry. Thermochemistry. is . the study of heat change in chemical reactions.. The . system. is . the specific part of the universe that is of interest in the study.. open. mass & energy. Why do chemical reactions happen?. Topic . 15: Energetics (. 8. . hours). 15.1 . Standard enthalpy changes of reaction. 15.1.1 . Define and apply the terms standard state, standard enthalpy change of formation (¬H ) f. Thermochemistry. 1. st. Law of Thermodynamics- total energy of the universe is constant (p. 244). Definitions and State Functions. System. - a system is the part of the universe that is being studied. In Chemistry, this is often just a particular reaction (p. 243). . b)Electro Negativity. . . Anitha. . George Varghese. Dept. of Chemistry. Marthoma. College. ELECTRON . AFFINITY (ELECTRON GAIN ENTHALPY) . Electron gain enthalpy. . is defined as the enthalpy change taking place when an isolated . SCOPE OF CONTENT OF MOE/GES CHEMISTRY SYLLABUS. THE . SCOPE OF THE SYLLABUS IS TO OFFER CHEMISTRY REQUIRED TO PROMOTE . AN UNDERSTANDING OF THE CHEMICAL PROCESSES TAKING PLACE ALL AROUND US.. SHS1. Change. First Law of Thermodynamics. Heat . (q. ). ,. work (. w. ) and internal energy (. E. ). Calculation of heat gained or lost by system. Calorimeter for measuring heat exchange (between system and surrounding;.