Thursday, March 17, 2011

Thursday, March 17th ( St. Patrick's Day)



Today in class, besides Mr.Tucker's cheesy jokes that he thinks are great, We took notes on Thermochemistry/Energy.

Here are the notes:
1. Temperature-

Average kinetic energy of the particles in a substance.

Units Used: Fahrenheit( we don't use this in class), Celsius and Kalvin.

2. Heat-

Transfer of Energy (joules).........Can be gained or lost.

Tuckers Joke: " There's also dominicks and walgreens".....yaaaa? no comment

3. Heat loss and Gain

Endothermic- Gaining heat

Exothermic- Loosing Heat.


In between notes we did a quick observation of Mr Tuckers " Magic Blocks." One block was wood and one was metal. The wood block was warm, compared to the metal block. After putting a piece of ice on both blocks, the ice melted faster on the metal block!! This was all due to the energy transfer.



Graph on page 2 of notes ( at top of blog):


Part1.A Heating and Cooling of a solid

Heat (q)= M * Cp ΔT (Tf-Ti)


Part2B Melting solid <-> Liquid freezing

Heat= M * HF

Part3C Heating/Cooling a Solid

Heat (q)= M * Cp ΔT (Tf-Ti)

Part 4D Boil a liquid <-> Gas condenses

Heat= M * HV ( Heat Vaporization )

Part5E Heating/Cooling a Gas

Heat (q)= M * Cp ΔT (Tf-Ti)

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