BHS Secondary Science

Key Terms law of conservation of energy, temperature, electrochemical cell, entropy, chemical equation, endothermic, exothermic, heat, rate, catalyst, concentration, collision theory, equilibrium, law of conservation of energy, temperature, electrochemical cell, electrochemical, electrical potential, anode, cathode, volt Essentials Extensions (If Time Permits) Eliminate Thermodynamics: • Observe or measure temperature changes in chemical reactions and classify as endothermic or exothermic • Identify activation energy, endothermic, and exothermic reactions using an energy diagram Reaction Rates: • Correlate frequency and energy of collisions to reaction rate. • Identify factors that increase reaction rates (temperature, concentration, particle size/surface area, catalysts). Equilibrium: • Explain the concept of reversible reactions • Describe how dynamic equilibrium is affected by adding a product, reactant, or heat (LeChatelier’s Principle) Electrochemistry: • Define reduction and oxidation in simple half reactions • Describe the direction of electron transfer in an electrochemical cell using an activity series. • Enthalpy (+ & - heat terms) • Gas pressures using LeChatelier’s Principle • Use information from graphs to draw warranted conclusions about reaction rates Math Skills Literacy Standards Graph Interpretation Units, dimensions, conversions WHST-2: Write informative/explanatory texts, including the narration of historical events, scientific procedures/experiments, or technical processes.

Resources

Popcorn Gas Factors Affecting Rate Cobalt Chloride, Fe 3+ ion and KSCN Reaction Coffee Creamer particle size

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