9/25/2011 1 1 CHEMISTRY 1307 Chapter V Principles of Chemical Reactivity: Energy and Chemical Reactions 2 Energy & Chemistry Questions that need to be addressed: •How do we measure and calculate the energy changesthat are associated with physical changes and chemical reactions? •What is the relationship between energy changes, heat, and work? •How can we determine whether a chemical reaction is product-favoredor reactant-favoredat equilibrium? •How can we determine whether a chemical reaction or physical change will occur spontaneously, that is, without outside intervention? 3 Energy & Chemistry Some Basic Principles •Energy is the capacity to ___work or ________heat (q). •Heat (q) is _____temperature, temperature is a measure of _____________. •Energy is divided into two basic categories: –______________(energy that results from an object’s position). –_______________(the energy associated with motion) •The law of conservation of energy requires that energy can neither be __________nor __________. •However, energy can be ___________ from one type into another.
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