Period._ - Chapter 17 Vocabulary 0-1.,.. ~ 0 Across 8. The amount ofheat needed to increase the temperature of 19 of a substance 1 degree Celsius. Down 1. A process that absorbs heat from the surroundings. 2. Everything in the universe not including the part you are focusing your attention on. 3. A measure ofthe average kinetic energy of particles in matter. 4. The minimmn energy colliding particles must have in order to react. 5. The heat content of a system at a constant pressure. 6. Energy that transfers from one object to another because of a temperature difference between the objects. 7. The precise measurement ofheat flow out of a system for chemical and physical processes. 8. A part of the universe on which you focus your attention. 9. A process that releases heat to. its surroundings. I 1- J<EY Name POTENTIAL ENERGY DIAGRAM e Potential Energy C+D b f Reaction Coordinate A + B - -+ C + 0 + energy Answer the questions using the graph above. 1. Is the above reaction endothermic or exothermic? 2. What letter represents the potential energy of the reactants? ----=b=-___ 3. What letter represents the potential energy of the products? _~--=--_ __ d___ 4. What letter represents the heat of reaction (L\H)? __ 5. What letter represents the activation energy of the forward reaction? __ n..~ __ 6. What letter represents the activation energy of the reverse reaction? _--" ~ _ _ _ 7. What letter represents the potential energy of the activated complex? e.Y\~~~ <:.. 8. Is the reverse reaction endothermic or exothermic? 9. If a catalyst were added, what letter(s) would change? . Chemistry IF8766 76 _--"~ _ __ CA I C l Rr.. r ©instructional Fair, Inc .
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