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THERMODYNAMICS
It’s Just a Phase—Heating
and Cooling Curves—Student Laboratory Kit
It seems counterintuitive—when freezing weather is predicted, orange growers spray the trees with water to prevent the fruit from freezing! The water actually releases heat when it solidifies. Use this experiment to investigate the solid–liquid phase changes for an unknown organic solid and determine the energy changes that take place when
a solid melts or a liquid freezes. Students measure heating and cooling curves to identify ane unknown solid based on its melting point. Kit contains three organic “unknowns,” test tubes, reproducible student handouts, background information and Teacher Notes.
AP6886 | $28.70
AP6049 AP8716
Flinn Digital Thermometers
Flaming Vapor Ramp—Chemical Demonstration Kit
Are volatile, flammable liquid vapors heavier than air? Safely demonstrate to students that using flammable liquids indoors can create a fire hazard—even far from an open flame. In this impressive demonstration, hexane vapors are poured down an aluminum vapor ramp toward a lit candle. When the vapor reaches the flame, all three necessary ingredients for a fire are present—oxygen, hexane fuel and a source of ignition. The flame travels back up the ramp leaving an impressive trail of fire as it goes. A very safe demonstration illustrating organic vapor flammability.
AP6154 | $19.25
If you want precision, the Flinn digital electronic thermometers are the way to go. Readings are more precise and can be taken faster since students can see the read-out at a glance—no more struggling to see the mercury level. And it’s a safer alternative to glass, liquid- or mercury-filled thermometers. Features include an on/off switch, °C/°F button, data hold button, 0.7 sec. sampling rate, and automatic shutoff after 10 minutes.
AP8716 | Digital Thermometer | $36.00 AP6049 | Digital Pocket Thermometer, Economy Choice | $29.30
Zinc Pyrotechnics—Chemical Demonstration Kit
A spectacular “fireworks” display is initiated by adding two drops of water to a mixture of dry chemicals. Place a beaker with very small amounts of zinc dust, ammonium nitrate and a catalyst in a fume hood. Add two drops of water to the mixture and watch as sparks, smoke and excitement fill the air. Must be performed on a heat- resistant surface in a fume hood or outdoors.
AP9117 | $24.20
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FLINN SCIENTIFIC I THERMODYNAMICS