Practice-Exams---1_13046

Practice-Exams---1_13046 - CHEN 204 Fall 2010 Practice Exam...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CHEN 204 Fall 2010 Practice Exam 1 1. You purchase a thermocouple with markings between 0 and 100. A calibration plot for the thermocouple is available from the manufacturer and is a straight line in logarithmic coordinates. The line passes through the points (G 1 = 20, T 1 = 110) and (G 2 = 40, T 2 = 250), where G is the thermocouple reading and T is the temperature in K. (a) Derive an equation for T (K) in terms of the thermocouple reading G. (b) Without doing any calculations, briefly justify whether you will have confidence in a temperature reading of 325K or 165K. 2. The absolute pressure of a gas P is related to its volume, and temperature by the ideal gas equation PV = 0.08206 nT . (a) If n is in moles, P is in atm, T is in K, and V is in L, what are the units of 0.08206? (b) In an experiment, you measure the pressure of a gas mixture using a Bourdon gauge . If the tank volume V is in ft 3 , the temperature T is in o F, and n is in lbmoles, express the ideal gas equation of state in terms of the new units. (c) A gas mixture containing 65 mole% O 2 and 35 mole% CO 2 is stored in a 3.5 ft 3 tank. The tank contents are at 95
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

Practice-Exams---1_13046 - CHEN 204 Fall 2010 Practice Exam...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online