Phys 1 Student Workbook.pdf

Name _____________________ Class ______________ Date _________Activity P17: Pressure versus Temperature(Pressure Sensor, Temperature Sensor)Concept DataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win)Gas laws P17 Pres v Temp.DS (See end of activity) (See end of activity)Equipment Needed Qty Equipment Needed QtyPressure Sensor (CI-6532A) 1 Rubber stopper, one-hole 1Temperature Sensor (CI-6505A) 1 Tongs 1Base and support rod (ME-9355) 1 Tubing, plastic (w/sensor) 1Beaker, 1 L 4 Protective gear PSClamp, buret (SE-9446) 1Connector, rubber stopper (w/sensor) 1 Other QtyCoupling, quick-release (w/sensor) 1 Glycerin 1 mLFlask, Erlenmeyer, 125 mL 1 Ice, crushed 1 LHot plate (for hot water bath) 1 Water 3 LWhat Do You Think?What is the relationship between the pressure of a gas and the temperature of a gas if its volumeremains constant as the temperature changes? Could you use this relationship to determine thevalue of Absolute Zero, the theoretical limit of low temperature?Take time to answer the ‘What Do You Think?’ question(s) in the Lab Report section.BackgroundSolid, liquid and gas are the most commonstates of matter found on this planet. The onlydifference among all these states is theamount of movement of the particles thatmake up the substance.Temperature is a measure of the relativemovement of particles in a substance becausetemperature is a measure of the averagekinetic energy of the particles. At anyspecific temperature the total kinetic energyis constant. Particles with a large kineticenergy tend to collide frequently and moveapart. Intermolecular forces tend to pullparticles toward each other. The forces thatbind some molecules together at a particulartemperature are greater than the kineticenergy of the molecules.In an “ideal gas” there are NO intermolecularforces. (In fact, the “Ideal gas” has no mass and occupies no volume!) While the “ideal gas” isfictional, real gases at room temperature and pressure behave as if their molecules were ideal. Itis only at high pressures or low temperatures that the kinetic energy of molecules is overcome byintermolecular forces and the molecules can "grab onto" one another.P17 © 1999 PASCO scientific p. 111