Lab 5 States of Matter.docx - StatesofMatterLab 1...

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States of Matter Lab Identifying and Describing Particle behavior as it relates to phase. 1. Describe differences and similarities between monatomic, diatomic, and  polyatomic particle behavior.  Monatomic are particles with only one atom, diatomic have two atoms and  polyatomic have more than two atoms. Monatomic are usually unstable, whereas  diatomic and polyatomic are more stable. Diatomic cannot exist by themselves,  polyatomic are able to exist naturally, and monatomic are naturally existing but  usually unresponsive. 2. Describe how the vapor pressure of a liquid or solid is measured. In a closed system, as a liquid or solid evaporates, the molecules are contained in  the system. The evaporation will eventually begin to condense again; when the  evaporation and condensing are at equal rates, then it is at equilibrium. The  pressure inside the system at equilibrium, is the vapor pressure. 3. Describe how changing the pressure or temperature can change the state of  matter.  By adding pressure, it is forcing the molecules to come closer together, and form  closer, stronger bonds. Gases have large gaps in between and loose connections; as it is condensed, the molecules move closer together and rebond, making it into  a liquid. Putting more pressure on the now liquid, it will eventually turn it into a  solid since they are so closely packed together. 4. Given the position on a phase diagram from which the labels are all removed,  identify the phase present and determine the microscopic behavior of  molecules. And vice versa. 
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