Heat is transferred to the piston of Problem 3 until the steam is a saturated vapor (it rises more than 2 m). The required heat transfer is nearest:
A) 4100 kJ
B) 3700 kJ
C) 3100 kJ
D) 2600 kJ
A) 4100 kJ
Q = ?H = m(h2 ? h1) = 2×(2683.5 ? 334.9) = 4097 kJ
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