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Homework Statement
An 8.5 g ice cube at -10°C is put into a
Thermos flask containing 200 cm3
of water at 20°C. By how much has the
entropy of the cube-water system changed when equilibrium
is reached? The specific heat of ice is 2220 J/kg·K.
Cw= 4190
Mi= 8.5
Mw= 200
Lf= 333000
Ci=2220
Homework Equations
Tf=cw*mw(20)-mi(lf+10ci)/mw*cw+mi*cw
Tf= 288.73 K
mi*ci*ln(273.15/263.15)+lf*mi/273.15+mi*cw*ln(288.73/273.15)+mw*cw*ln(288.73/293.15)
The Attempt at a Solution
.70366+10.36+1.975-6.365
I got 6.67 J/k. But I'm not sure that's right.