A.+172.5 kJ/mol | B.-172.5 kJ/mol | C.+110.5kJ/mol | D.-110.5kJ/mol |
A.电极方程式:Cu-2e- = Cu2+,既能发生在原电池中,又能发生在电解池中 |
B.某温度下,10mL 0.1mol/L的H2SO4溶液与10mL 0.4 mol/L的KOH溶液混合后,pH=13 |
C.断裂1mol H-H、N-H、N≡N键需吸收的能量分别为a kJ、b kJ、c kJ, 则2NH3( g)3H2(g)+N2(g) △H="(3a+c-6b)" kJ/mol |
D.中和等体积的醋酸溶液,消耗等pH值的氨水和氢氧化钠溶液的体积分别为V1、V2,则V1<V2 |
A.+ 283.5kJ/mol | B.+ 172.5kJ/mol |
C.—172.5kJ/mol | D.—504kJ/mol |
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