373.2K,101.3kPa的H2O(g)其化学势为μ1,373.2K,50.65kPa的H2O(g)其化学势为μ2,则:(1)μ1=μø (2)μ2-μ1=-8.314×373.2ln2 (J·mol-1)(3)μ2-μ1=8.314×373.2ln2 (J·mol-1) (4)μ1=μ2以上正确的是( )
A:(1) (2)
B:(1) (3)
C:(3) (4)
D:(2) (4)