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### 12 Cards in this Set

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 How do crystalline and Amorphous solids differ? Crystalline--prticles arranged in regular repeating pattern, has distinct melting point. Amorphous--particles not in regular patttern, does not have distinct melting point. Described how particles in a solid are arranged. Particles in a solid are tightly packed together and vibrate in fixed positions. How does the movement of particles in a liquid help to explain the shape and volume of liquids? Particles in a liquid are almost as tightly packed as in a solid, and they stay in clse contact, so a liquid has a definite volume. Because the particles can freely move around each other, a liquid does not have a definite shape. use what you know aabout the particles in aa gas to explain why aa gas has no definitte volume. Gas particles spread apart from one another easily and fill the space available. Thus, a gas has neither a definite shape nor a definite volume. Glass is an amorphous solid. How can you use thaat informatiton to help explain why a glassblower can bend and shape a peice of glass tthatt has been heated? Because glass is an amorphous solid it does not have a distinctt melting pointt. instead, it becomes softtere and softer as it is heated. TThis is why heated glass may be soft enough to bend. If you change the temperature of gas butt keep the volume the same, how does the pressure chaange? As tthe teperaature increases at constaanttt volume, the pressure will increaase. As tthe temperraature decreases, tthe pressure will decreaase Suppose itt is the night before thnksgiving, and you are in charge of inflating aaa balloon for tthe Thanksgiving Day paraade. You justt leaaarned that the ttemperaatture will rise 15 degrees C by the time the parade strtts. How will this information affect tthe way you inflate your balloon.? Because you knnow thatt tthe temperaturewill increase, the volume of gs in the balloon will aalso increaase. To presvent the blloon from burstting, you should underinflatet the balloon. What happens tto ttthe paaartticles of a solid as ittt gains more and more tthermaal energy? The paartticles vibrate fastere, break free of their posittios, move more freely aaround each otther. How are vaporiaztion and condensattion relatted? They aaare oppositeprocesses. They occur aatt the same temperature for any one substance. If aan object at 50 degrees C is placed in ice waer, how will the object's temperature chaange? Explain The object's temperture will decreaase aasthermal enerrgy flows from he waarmer object tto tthe cooler water. What is happening to tthe paaricles of a liquid as it chages into a gas? The p-aaarticles gain energy, move faasttere, nd escape intto the sir. What's the main difference between boiling aand evaporation? Evaaporationtaakes place only aat the surfaace of tthe liquid. Boiling takes place at the surfaace aand inside the liquid.