HEAT INTRODUCTION Heat is a measure of the energy in a system. The transfer of energy is always from the system with more energy to the system with less energy. This lab has two distinct parts. In the first part, you will examine what happens to a gas when the temperature is changed. In the second part, you will use the idea of energy transfer to move water. You will need to be familiar with the ideas of phases (solid, liquid and gas), what specific heat is, and how to calculate joules. Please see pages 93-94, 99-101, and 106-110 in your textbook. MATERIALS 1 small mouth (or small neck) bottle... a soda bottle should work 1 coin (dime or penny - must cover completely mouth of bottle) 1 large container to submerge at least the bottle (sink, tub, bowl, etc.) Enough cold water to submerge the bottle Measuring cups Food coloring - in kit 4 cups water 1 large bowl to hold water - a clear glass one works best 1 small glass that will extend above water level when in bowl Saran wrap/cling film - enough to cover bowl 1 small object (example: pebble, coin, marble) Sunny days (3-4) PART#1: Magic Coin? Procedure: Fill selected container with some cold water. Place the bottle and coin in the bowl of water to chill them. The bottle must be submerged upside down. Submerge at least the neck of the bottle but if you have no "coin activity" on step four, repeat this step with either a greater amount of submersion or submerge the bottle for a greater amount of time. Place the coin on the top of the bottle. There should be an airtight seal when you place the coin on the top of the bottle. Wrap your hands around the bottle and wait for several seconds to a minute. When you believe that the bottle is warmer than room temperature, allow the bottle to cool with the coin in place. Answer the following questions based on your observations. Questions: Approximately how long did you submerge the bottle in step #2? What happened during step #4? What happened during step #5? Explain what is happening to the molecules to create the "coin activity".