Laboratory Manual for Principles of General Chemistry: Experiment 6 Prelaboratory Assignment: Calorimetry Flashcards

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1

1.

[((100x1cal/s)(24.6-22))/(20.91-(99.4-24.6))]=0.166/g

2

2.
-a
-b

-a Place metal in a dry test tube. Place test tube below water surface in filled beaker.
-b Use boiling chips in beakers

3

3.
-a
-b

-a It does up, decreases. Heat is retained longer in the metal, than it the liquid.
-b Heat is lost, so you have to account for the lose so that it doesn't go into increasing the temperature of the mixture.

4

4.

- They both should get the same temperature.
- Difference lies in amount of mass being heated in each experiment. Brett and Lindsey add same amount of water: 45.5 instead of 50ml.

5

5.
-a
-b

-a Lattice energy is less than hydration
-bIncreased temperature usually increases the solubility of solids in liquids in accordance with the Second Law of Thermodynamics. Increased temperature means a greater average velocity for the particles. This allows them to move from one position to another more easily.