Semester Exam Review Key vocabulary Limiting reagentpercent yield Theoretical yieldexcess reagent Actual yieldcalorimeter Caloriejoule Enthalpyspecific.

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Presentation transcript:

Semester Exam Review Key vocabulary Limiting reagentpercent yield Theoretical yieldexcess reagent Actual yieldcalorimeter Caloriejoule Enthalpyspecific heat Heat capacityheat of reaction Heat of formationheat of fusion Heat of solution Hess’s law of summation

Key questions: Thermochem 1.How does heat energy flow? 2.What does endothermic mean? 3.What does exothermic mean? 4.Is heat ever lost? 5.What equation do you need to calculate the heat change (q) in a reaction. What do the letters stand for? 6.What is specific heat? 7.What type of reaction has a positive ∆H? 8.What type of reaction has a negative ∆H? 9.Which substance has the highest specific heat? 10.What is the heat of solution?

Key Questions: Stoichiometry 1.What is stoichiometry? 2.How do you read this equation: 2 S(s) + 3 O 2 (g)  2 SO 3 (g) 3. How many moles of Al are needed to react with 1.2 mol of FeO? 2 Al (s) + 3 FeO (s)  3 Fe (s) + Al 2 O 3 (s) 4. How many moles of Al 2 O 3 are produced when 0.60 mol of Fe are produced? (use equation above) 5. What do you call the reactant that is used up first?

Key Questions: Gases 1.How do gases move? 2.How does gas come out of an aerosol can? 3.What happens to a gas when the volume of its container gets reduced? 4.What happens to the temperature of a gas when it is compressed? 5.Why does air escape from a tire when the valve is opened?