Quiz 2 - Chemistry 236 Quiz 2 Lab Day February 4 2014...

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Chemistry 236 -- Quiz 2 Lab Day ____ February 4, 2014 — Experiments 1 and 2 Pledge and signature: Note: If you want your paper returned folded ( i.e. , score concealed), please print your name on the back. A. (3) Calibration functions. A Baratron pressure gauge gives a reading of - 0.27 V when P = 0, and 8.51 V when P = 761 torr. What is the apparent P when this gauge reads 4.33 V? B. (3) P calibration — away from mercury. An oil manometer charged with dibutyl phthalate ( r = 1.046 g/mL) yields a level difference h = 42.3 mm in a system where the reference arm is held at a pressure of P = 1.06 Torr. What is the pressure of the gas sample? ( r Hg = 13.595 g/mL) C. (6) Calibration — Fitting the data. You obtain the illustrated results upon fitting your thermistor calibration data (true - thermistor vs. thermistor), obtained over the region 19-32°C. 1. Properly state the correction and its statistical error at 25°C. 2. If there are 24 data points, what is the estimated standard deviation ( s y ) of these data?
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