Lise Gibbs relation du & T‘dg - l’dv and one of Maxwell's rclaticns to find an
cxpressixm for («flu/63?}; that (mly has propcnies P. v and T involved. What is the
value cal“ that partial derivative éf you have an ideal gas?
:11: m Tds -— Pdv divide
One mole of water is placed in surroundings at -3 °C. but at ﬁrst it does not freeze (it remains as supercooled water) Suddenly it
freezes. Calculate the entropy change in the system during the freezing, making use of the renewing data:
Sonntag, Borgnakke and van Wylen
Air at 600 K ﬂows with 3 kg/s into a heat exchanger and out at 100°C. How much
(kg/s) water coming in at 100 kPa, 20°C can the air heat to the boiling point?
C.V. Total heat exchanger. The ﬂows are not mixed so the tw
200 cm3 of a 0.5 mol solution of sucrose is diluted to 1 dm3 by the addition of 800 cm3 of water. Assume ideal behavior and
calculate the entropy change.
Given: Ideal: V = 200 cm". "mm :05 mol, Vl = l drn", V =800 cm3