Q1/A) A mercury thermometer having a time constant of (25106nh) is initially at(600 °C), it is immersed in a bath at (175 °C) at (t=0), determine the temperaturereading at (t =2 min). Also, if the thermometer is read a temperature at (t =3.5 min),and then is removed from the bath and immersed to another bath at (500 °C), findwhat will be the temperature reading at (t =4.5 min)?

Step 1: To solve this problem, we can use the exponential decay formula for the temperature of the…

Answered: Q1/A) A mercury thermometer having a…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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Q2 A thermometer having a time constant of 10 sec is placed in a temperature bath. After the thermometer reaches steady state temperature of 30°C, it is suddenly placed into a hot fluid at 60 "C. Sketch the response of the thermometer Given -t Y(1) = AK p (1-e Y(t) = y(t) + ys %3D
An empirical equation for calculating the inside heat transfer coefficient, hi , for the turbulent flow of liquids in a pipe is given by: 0.023 G0.8 K0.67 Cp0.33 hị D0.2 µ0.47 where h; = heat transfer coefficient, Btu/(hr)(ft>(°F) G=mass velocity of the liquid, lbm/(hr)(ft)² K = thermal conductivity of the liquid, Btu/(hr)(ft)(F) Cp = heat capacity of the liquid, Btu/(lbm)(°F) u= Viscosity of the liquid, lbm/(ft)(hr) D= inside diameter of the pipe, (ft) Verify if the equation is dimensionally consistent.
In winter, a canal in Canada has an ice layer on its surface. The depth from the surface to the bottom of the canal is 1.6m. If the temperature of the air above the ice is -3.1 °C and the temperature of water at the bottom of the canal is 3 °C, what would be the thickness of the ice layer? (Please write your answer in the box without rounding. Write what you see on the calculator up to two decimal points WITHOUT UNIT.) Answer:
A mercury thermometer is initially located in a 75°F room. It is suddenly immersed in a 400°F oil bath and the following data is obtained. 1 (s) 2.5 8. 10 15 30 T(PF) 75 107 140 205 244 282 328 385 Find two independent estimates of the thermometer's time constant. What can you say about the time constant in general. Please explain.
Q1/A mercury thermometer having a time constant of (180 s) is initially at (400°C), it is immersed in a bath of (120°C) at t=0, derive a formula to determine the indicated] temperature at (t =1.2 min) and (t =2.3 min). Also, if the thermometer is read a temperature at (t =3.5 min), and then is removed from the bath and return to the initial bath, determine what will be the temperature reading at (t =5 min)?
The amount of heat needed to change the temperature of an object can be calculated using the following equation: Q = mc,AT where Q = amount of heat in Joules (J) m = mass of object in kilograms (kg) Cp = specific heat of object AT = change in temperature in °C What is the appropriate unit for c, if the preceding equation is to be homogeneous in units? (Type units in box below - be sure to mark your answer on your work that you will submit at the end of the exam).
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A thermostat control with dial markings from 0 to 200 is used to regulate the temperature of an oil bath. A calibration plot on logarithmic coordinates of the temperature (°F) versus the dial setting R is a straight line that passes through the points (R₁= 10.0, T₁ = 110.0 °F) and (R₂=60.0, T₂=250.0°F). a. In the equation T(°F) = ARº, what are the values of A and b? A = b = R= i b. Estimate the thermostat setting need to obtain a temperature of 340.0°F. °F R = c. Estimate the thermostat setting needed to obtain a temperature of 120.0°C.
Q1/A) A mercury thermometer having a time constant of (9000 μh) is initially at (250F), it is immersed in a bath of (130F) at t=0, determine the temperature reading 1212 (t =2 min). Also, if the thermometer is read a temperature at (t =3.5 min), and then is removed from the bath and then is immersed in a bath of (300F), determine what will be the temperature reading at (t =1.5 min)?
Q1/A) A thermometer having a time constant of (10 mh) is initially at (300°F), it is suddenly placed in a bath of (75°F) and left there for (2 min) after which it is immediately return to the initial bath. Derive a formula to calculate the thermometer reading at (t = 1 min) and (t = 3 min)?
A cylindrical tank is vented to the atmosphere that serves as a reservoir for octane before itis piped to another location is 140 ft in diameter. Determine the pressure difference betweenthe top and bottom of the walls due to the octane when the tank is filled to a depth of 30 ft(9.14 m). Why is the vent necessary?NB: Atmospheric conditions are such that the pressure is 1atm and temperature 25 oC. SG ofoctane is 0.701

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