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How much total heat transfer is necessary to lower the temperature of 0.215 kg of steam from 145.5 °C to –31.5 °C, including
the energy for phase changes?
total heat transfer:
J
How much time is required for each stage of this process, assuming a constant 855.0 W rate of heat exchange? Give the times
in the order that the stages occur.
t =
S
t2 :
S
t3 =
S
t4 :
S
t5
S
II

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