Abstract for chee 291

Abstract for chee 291 - ) ) where is the time constant...

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Abstract Our lab was divided into two sections; temperature and pressure. The objective of the temperature section was to prepare a calibration curve for a thermistor, platinum resistance thermometer, and a copper-constantan thermocouple in a dry ice bath, ice water bath, boiling water bath and a liquid nitrogen bath and then find the time constant of a thermocouple in air and water. Before recording the temperature in each bath with any device, we must allow the device to reach equilibrium by placing it in the ice water bath. Then we can place it any bath and record the temperature. During the thermocouple response time experiment, we either neutralize the thermocouple in an ice bath or boiling water bath or then expose/plunge it in ice water, boiling water and air. During warming, we will be able to record the transient response. We will get this equation: For warming, Transient response of the thermocouple= (1-e^ (-t/ τ) ) where τ is the time constant For cooling, transient response of the thermocouple = (e^ (-t/
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Unformatted text preview: ) ) where is the time constant Behaviour The objective of the pressure section of our lab was to discover the relationship between vapour pressure and temperature. We had a vessel filled up with warm water; we turned the heat on and the transducer, and started recording our data when the vessel reached 100 C and then following an additional 10 C from the previous recording. Until we have a sufficient amount of data. To find the relationship between temperature and pressure by using the ideal gas law: P1V1=N1RT1 P2V2=N2RT2 In this experiment, we have to assume that the concentration and the volume remain constant throughout the whole experiment. N1=N2 V1=V2 Therefore: P1/T1=P2/T2 We also have to look at the relationship between the absolute pressures of both gauges vs. the pressure transducer. We saw a linear relationship when observing the gauges vs. the pressure transducer. (Maybe you can add a sentence because I dont know what kind of relationship this is) Words:250...
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This note was uploaded on 11/15/2010 for the course CHEE 638 taught by Professor Hampton during the Spring '10 term at MO Southern.

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Abstract for chee 291 - ) ) where is the time constant...

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