Homework Help is Here – Start Your Trial Now!
Engineering
Chemical Engineering
2. Calculate the quantity of heat in kJ to be transferred to 9.5 lb of brass to raise its temperature from 30°C to 485°F taking the specific heat of the brass as 0.394 kJ/kg- К.

2. Calculate the quantity of heat in kJ to be transferred to 9.5 lb of brass to raise its temperature from 30°C to 485°F taking the specific heat of the brass as 0.394 kJ/kg- К.

Introduction to Chemical Engineering Thermodynamics
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
See similar textbooks
icon
Related questions
Question

Task 1. Answer only 2

TASK# 1. Solve problems involving heat transfer by convection processes. Problem Solving Instructions: Analyze and solve the following problems. Enclose your final answer in a box. In a hot air heating system, the furnace heats air from 66°F to 120°F. If the air is then circulated at the rate of 510 ft³/min by the blower, how much thermal energy is transferred per hour? 1. Note: the specific heat of air at constant pressure is 0.250 Btu/lb°F, the density of air is 0.0806 lb/ft³ at atmospheric pressure. 2. Calculate the quantity of heat in kJ to be transferred to 9.5 lb of brass to raise its temperature from 30°C to 485°F taking the specific heat of the brass as 0.394 kJ/kg- К. 3. At an average temperature of 212°F, hot air flows through a 9 ft long tube with an inside diameter of 55 mm. The temperature of the tube is 70°F along its entire length. Convective film coefficient is 20.1 W/m²-K. Determine the convective heat transfer from air to tube. Brine enters a cooler at a rate of 58 m /hr at 63°F and leaves at 1°C. Specific heat and specific gravity of brine are 1.117 kJ/kg-Kand 1.5 respectively. Calculate the 4. heat transferred in kW. 5. For heat transfer purposes, a standing man can be modeled as a 30 cm diameter, 170 cm long vertical cylinder with both the top and bottom surfaces insulated and with the side surface at an average temperature of 34°C. For a convection heat transfer coefficient of 15 W/m2 -°C, determine the rate of heat loss from this man by convection in an environment at 20°C.
Transcribed Image Text:TASK# 1. Solve problems involving heat transfer by convection processes. Problem Solving Instructions: Analyze and solve the following problems. Enclose your final answer in a box. In a hot air heating system, the furnace heats air from 66°F to 120°F. If the air is then circulated at the rate of 510 ft³/min by the blower, how much thermal energy is transferred per hour? 1. Note: the specific heat of air at constant pressure is 0.250 Btu/lb°F, the density of air is 0.0806 lb/ft³ at atmospheric pressure. 2. Calculate the quantity of heat in kJ to be transferred to 9.5 lb of brass to raise its temperature from 30°C to 485°F taking the specific heat of the brass as 0.394 kJ/kg- К. 3. At an average temperature of 212°F, hot air flows through a 9 ft long tube with an inside diameter of 55 mm. The temperature of the tube is 70°F along its entire length. Convective film coefficient is 20.1 W/m²-K. Determine the convective heat transfer from air to tube. Brine enters a cooler at a rate of 58 m /hr at 63°F and leaves at 1°C. Specific heat and specific gravity of brine are 1.117 kJ/kg-Kand 1.5 respectively. Calculate the 4. heat transferred in kW. 5. For heat transfer purposes, a standing man can be modeled as a 30 cm diameter, 170 cm long vertical cylinder with both the top and bottom surfaces insulated and with the side surface at an average temperature of 34°C. For a convection heat transfer coefficient of 15 W/m2 -°C, determine the rate of heat loss from this man by convection in an environment at 20°C.
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Process Dynamics and Control, 4e
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:
9781119285915
Author:
Seborg
Publisher:
WILEY
Industrial Plastics: Theory and Applications
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The
SEE MORE TEXTBOOKS