Thermo+Kin+Lecture+7withSolns

# 2 repeat the same for a temperature of 100c again

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Unformatted text preview: ffect of temperature on enthalpy and entropy between standard state and 35°C is negligible. 2. Repeat the same for a temperature of 100°C, again using similar assumptions. 3. Could you have guessed the latter without doing any calculations? Sample Problem 6 (Tinoco ch. 3 #27): Effect of pressure on water freezing point The temperature of a typical laboratory freezer unit is -20°C. If liquid water in a completely filled, closed container is placed in the freezer, estimate the maximum pressure developed in the container at equilibrium. The enthalpy of fusion of water may be taken as 333.4 kJ/kg, independent of temperature and pressure and the densities of ice and liquid water at -20°C are 0.9172 and 1.00 g/cm3, respectively. . '~Q Jh 0 C~)Q-ef! ~- ~ )~d J QO r (S) Q""CH . / ( /) -Lo/e-LGJV ~l-::d J oO ( 0) r Q~t1 ~t =:d J Q O~-+'I:) (OJ QeH = ") 17 P'1l 'G -= d (If) Q -en ( YlOVl >f d"-(Y) +(lg +/"tJ ( 'J 0 Q -e .S.1 ~s 0 ~ o j f.""""jRQQ'/ _.. ~ <cwvy.f, I ( j()'O ~ / 6'0 • J -= (-J"QF- -P' - od/ - GOJ :::: ~)II\ n· P\1.'""" /lOj "it ' )J ~ ()] pit VI} ~ ~~ "f ~0 P lV'1lJ lI]'J ~/'>1 ~ ~~ ~1-Ji' s-<ro'l"Ol! ) - fll -/\ ::: ~ S f\ V pa/ld _ h'~Te- ..... ( ~I ~ d ) 1\'7 == ~I(!>I _ CJ I i ~ '­ d (>l~st'9 - v' ----- Cd -"'d -; /\ V ::: Id C) \J - d ~V...
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## This document was uploaded on 03/03/2014.

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