question archive At 473oC the Pb-Sn system exhibits regular solution behavior with the activity coefficient of Pb given by: ln γP b = −0
At 473oC the Pb-Sn system exhibits regular solution behavior with the activity coefficient of Pb given by: ln γP b = −0
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At 473oC the Pb-Sn system exhibits regular solution behavior with the activity
coefficient of Pb given by:
ln γP b = −0.32 (1 −XP b)2
(a.) Write the corresponding equation for the variation of γSn with composition
at 473oC.
(b.) calculate aP b in the XP b = 0.5 alloy at 746 K and 1000 K.
(c.) If one mole of Pb at 25oC is added to a large quantity of liquid alloy of
composition XP b = 0.5 which is thermostated at 473oC, calculate:
(i.) the heat flow from the thermostat into the liquid alloy, and
(ii.) the entropy increase in the surroundings resulting from the process
