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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Number 6 please

Transcribed Image Text:A small lead block, of mass M and initial
temperature 3T, is placed in contact with a
large lead block, of mass 4M and initial
temperature T. The system as a whole is
isolated, so that no heat is lost to the
surroundings.
c) Find the change in the entropy of the small
block during this process. (Denote the specific
heat of lead by cL.) Is your answer consistent
with the Second Law?
d) Next, find the change in entropy of the large
block during this process. Is your answer
consistent with the Second Law?
a) Will the final temperature of the two-block
system be less than 2T, greater than 2T, or
equal to 2T?
e) Finally, find the change in entropy of the two-
block system. Is your answer consistent with
the Second Law?
b) Find the final temperature Tr in terms of T.
Was your answer to part (a) correct?
6.
A lead block of mass M is at initial
temperature TL. The block is placed within a
The
If M = 12 kg, m = 75 g, and Tw = 30 °C, then
what must TL be (at least) if we want all the
water to vaporize?
thermally insulated canister of water.
and is initially at
water has
mass
(Use Cw = 4190 J/kg.0C, CL = 129 J/kg.C, LyH20
= 2260 kJ/kg) *
temperature Tw.
A cold block of ice is placed in a hot bowl made
of lead.
a) Find Tr in terms of the symbols shown in the
diagram.
b) Find the change in entropy of the bowl for this
process. (Leave your answer in terms of Tt.)
c) Next, find the change in entropy of the H20
for this process. (Again, leave your answer in
terms of Tr.)
thermally fora to
ed o sd tin
Tice
the combined bowl+H2O system, will the
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