23. 若水100 ℃及1 atm之汽化熱為539.7 Cal/g,現有一莫耳水蒸汽在沸點100 ℃凝結成水,試算ᇞE為何?(假設水蒸汽為理想氣體,且液態體積相對氣體體積可忽略。R = 1.987 Cal/K/mole)
(A) -6979 Cal/mole
(B) -7979 Cal/mole
(C) -8979 Cal/mole
(D) -9979 Cal/mole
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統計: A(1), B(0), C(7), D(4), E(0) #3354681
統計: A(1), B(0), C(7), D(4), E(0) #3354681