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Energy Review Test and After School Review Schedule

Join us for a comprehensive review session covering Heating/Cooling Curves, Hess's Law Systems and Surroundings Problems, Drawing Energy Diagrams, and Determining Molar Enthalpy Changes. Learn to calculate enthalpy changes, work with energy diagrams, and understand the significance of specific heats in various materials. Get ready for your upcoming test!

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Energy Review Test and After School Review Schedule

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  1. Energy Review Test: Monday 3/31 (period 7) and Tuesday 4/1 (period 6) After school review Friday 3/29

  2. Heating/Cooling Curve • During the polar vortex, people were taking boiling water and throwing it to watch it freeze. • Draw a heating curve and calculate the enthalpy change if water at 100 C is thrown into -7C air and freezes solid!

  3. Hess’s Law

  4. Systems and Surroundings Problem • Calculate the mass of iron that would heat up 100 mL of water by 3 degrees Celsius if the iron was initially heated to 80 C and the final temperature of the water was 26 C.

  5. Drawing an energy diagram • N2 + 2O2 + 16.4 kCal2 NO2 • Draw an energy diagram, label reactants, products and enthalpy change, and identify if the reaction is endothermic or exothermic. • Also, you must label enthalpy change in joules!!!

  6. Determining molar enthalpy change • Given the equation below, what would be the enthalpy change if 40 g of nitrogen monoxide was reacted with excess oxygen gas.

  7. Distinguish between: • Enthalpy, energy, heat, temperature, entropy. • Specific heat of: water, air, metals • Draw a graph showing the relative location of each was a function of x (mass per unit of energy) and y (temp) • Explain how this is important in terms of climate and everyday applications.

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