用H2O2和H2SO4的混合溶液可溶解废旧印刷电路板上的铜。已知:
Cu(s)+2H+(aq)═Cu2+(aq)+H2(g)△H=" +64.39" kJ·mol -1
2H2O2(l)═2H2O(l)+O2(g)△H= -196.46 kJ·mol -1
H2(g)+ 1/2O2(g)═H2O(l))△H=-285.84 kJ·mol -1
在H2SO4溶液中,Cu与H2O2反应生成Cu2+(aq)和H2O(l)的反应热△H等于
A.-417.91 kJ·mol -1 |
B.-319.68 kJ·mol -1 |
C.+546.69 kJ·mol -1 |
D.-448.46 kJ·mol -1 |