题目

关于下列三个反应的说法正确的是 ①101 kPa时,2C(s)+O2(g)===2CO(g)     ΔH=-221 kJ·mol-1 ②2H2O(g) ===2H2(g)+O2(g)            ΔH=+571.6 kJ·mol-1 ③稀溶液中,H+(aq)+OH-(aq)===H2O(l)   ΔH=-57.3 kJ·mol-1 A.碳的燃烧热的数值等于110.5 kJ·mol-1             B.H2的热值为142.9kJ·g-1 C.10mL0.1mol·L-1的H2SO4溶液和5mL 0.1mol·L-1NaOH溶液混合,中和热小于57.3 kJ/mol D.常温常压下,反应①一定能自发进行----Could you help me put up the maps on the wall? ---- _______. I will do it for you right away.A. That’s all right B. I hope so C. No problem D. That’s right
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