下列说法正确的是{"A":"\u5df2\u77e52C\uff08s\uff09+O2\uff08g\uff09\u25502CO\uff08g\uff09\u25b3H=\ufe63221 kJ\u2022mol_刷题宝

题干

下列说法正确的是（）

A：已知2C（s）+O₂（g）═2CO（g）△H=﹣221 kJ•mol^﹣¹，则C（碳）的燃烧热为110.5 kJ•mol^﹣¹

B：已知氢气燃烧热△H=﹣285.5 kJ•mol^﹣¹，则2H₂O（l）=2H₂（g）+O₂（g）△H=+285.5 kJ•mol^﹣¹

C：已知中和热△H=﹣57.3 kJ•mol^﹣¹，若将含0.5 mol H₂SO₄的稀溶液与1 mol NaOH固体混合，放出的热量小于57.3 kJ

D：含20.0 g NaOH的稀溶液与稀盐酸完全中和，放出热量28.7 kJ，则稀醋酸和稀NaOH溶液反应的热化学方程式为：NaOH（aq）+CH₃COOH（aq）═CH₃COONa（aq）+H₂O（l）△H＞﹣57.4 kJ•mol^﹣¹

上一题下一题 0.0难度选择题更新时间:2019-05-23 12:49:59

答案(点此获取答案解析）

D

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