2 kg of steam (gaseous H 2 O) at its boiling point and a 23 kg solid iron bar initially at a temperature of 300 o C are placed in a thermally insulated container with 6 kg of an unknown substance (called substance X) and allowed to reach thermal equilibrium Substance X obeys the following Temperature Vs Energy Added diagram The initial and final states of substance X are labeled (i and f) on the above diagram Determine the final state (temperature and phase) of the H 2 O and the iron If either substance ends in a mixed phase determine how much mass is in each phase T(C) Substance X 20 f 0 20 40 i 60 80 100 500 1000 1500 2000 2500 3000 3500 E Added (kJ)

Question

2 kg of steam (gaseous H 2 O) at its boiling point and a 23 kg solid iron bar initially at a temperature of  300 o C are placed in a thermally insulated container with 6 kg of an unknown substance (called substance X) and allowed to reach thermal equilibrium  Substance X obeys the following Temperature Vs Energy Added diagram The initial and final states of substance X are labeled (i and f) on the above diagram  Determine the final state (temperature and phase) of the H 2 O and the iron  If either substance ends in a mixed phase determine how much mass is in each phase  T(C) Substance X 20 f 0  20  40 i  60  80  100 500 1000 1500 2000 2500 3000 3500 E Added (kJ)

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2 kg of steam (gaseous H 2 O) at its boiling point and a 23 kg solid iron bar initially at a temperature of -300

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