Question

Q2) One kg of saturated water at 120 C, is completely condensed at constant pressure. If the surrounding temperature is 30 C, The entropy changes of the system (kJ/K) is 5.6 6.5 -6.5 -- 5.6 The heat exchanged with surroundings (kJ) is 2200 4200 2430 2400

Answer 1

1 5012: → condensing of saturate ceeater at 10°c to completely Ligail state for one 1kg of saturated center, if sunowshig tenperature is To =30°C, 0 The entropy changes of the system Chylk) is, Heret releases from Saturated water at 120°C (-adorsed completely 11 as mox cps * Tsa - Te) + vist hevap = 1x1.996* C120-400) +2264-705 Q = 2, 304.625 kJ (Data, Cps = 1.996 kJ/kg te, heup=2264.703 kilkg taken from wikipedia)

2 The entropy changes of system is, 45= -a - Tsat where -a is taken because of heat loss, so the entropy of system is decreases) Asa 2304.625 (120+233) Asz-5.86 KJ K 2 The heat exchanged with surrounding (KJ) is, -> The feat removed from Saturated cates ceelile condensareg to liquid state is transfered to the surrounding air temperature, So, the amount of heat transferred to surrounding is, 2 = 2, 304.625 KI