—What a fine day! Why not go out for a picnic? —__________. Let's go.
A:Pardon me
B:I'm afraid not
C:Sounds cool
已知1mol H2SO4(aq)与1mol Ba(OH)2(aq)反应的△H=﹣1 584.2kJ•mol﹣1;稀溶液中,H+(aq)+OH﹣(aq)═H2O(l)△H=﹣55.6kJ•mol﹣1.则Ba 2 + a q +SO42- a q ═BaSO4(s)的反应热等于( )
A.
B.
C.
D.
Ann会跳绳怎么说?