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Scholar
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Date Posted: 7/17/2008 11:23:46 AM  Status: Live
help please.......will rate lifesaver
Course Textbook Chapter Problem
Thermodynamics Fundamentals of Engineering Thermodynamics (5th) by Moran, Shapiro 3 N/A
Question Details:
Problem 3.88
A 0.2 ft3 aluminum bar, initially at 206°F, is placed in an open tank together with 4 ft3 of liquid water, initially at 70°F. For the water and the bar as the system, determine the final equilibrium temperature, in °F, ignoring heat transfer between the tank and its surroundings.

°F
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Oracle
Karma Points: 16,566
Date Posted: 7/17/2008 1:39:20 PM  Status: Live
Asker's Rating: Lifesaver   
Response:
specific heat: cAl = 0.897 J/g-K, cwater = 4.18 J/g-K
density: ρAl = 2.7 g/cm3, ρwater = 1.0 g/cm3
volume: VAl = 0.2 ft3, Vwater = 4 ft3
temperature: TAl = 206 F, Twater = 70 F
Find final temperature T.
ρAl *VAl * cAl *(TAl - T) = ρwater *Vwater * cwater *(T - Twater)
plug all known values and get
T = 73.8 F
chemlady's Comment:
thanks for all ur help



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