At atmospheric pressure, 45 moles of liquid helium are vaporized at its boiling point of 4.22 K. The heat of vaporization of helium, at atmospheric pressure, is 2.09 × 104 J/kg,
and the atomic weight of helium is 4.00 g/mol. The change in the entropy of the helium, as it vaporizes, is closest to
A) 890 J/K.
B) 14,000 J/K.
C) 18,000 J/K.
D) -9400 J/K.
E) -14,000 J/K.
A
Physics & Space Science
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