Liquid lead initially at 500 61616 C is poured into a form so that it holds 2 kg It then cools at constant pressure down to room temperature of 20 61616 C as heat is transferred to the room The melting point of lead is 327 61616 C and the enthalpy change between the phases, hif, is 24 6kJ kg The specific heat is 0 138kJ kg K for the solid and 0 155kJ kg K for the liquid Calculate the net entropy change for this process

Question: Liquid lead initially at 500C is poured into a form so that it holds 2 kg. It then cools at constant pressure down to room

Liquid lead initially at 500C is poured into a form so that it holds 2 kg. It then cools at constant pressure down to room temperature of 20C as heat is transferred to the room. The melting point of lead is 327C and the enthalpy change between the phases, hif, is 24.6kJ/kg. The specific heat is 0.138kJ/kg K for the solid and 0.155kJ/kg K for the liquid. Calculate the net entropy change for this process.

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