3. A phase change is a change from one phase to another. What phase changes would you
see in this example?
Gizmo Warm-up
In the Phases of Water Gizmo, you can heat up or cool down a
beaker of water.
1. Press Heat to heat up the water. Wait until the temperature
stops rising and observe. What happens?
2. Why do you think the lid lifts up?
3. Now press Chill to remove thermal energy from the water. What happens now?

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.