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一、选择题题1 (2003年全国高考)已知在1×105Pa,298K条件下,2 mol氢气燃烧生成水蒸气放出484 kJ热量,下列热化学方程式正确的是( ) (A)H2O(g)=H2(g)+1/2O2(g)
1. Selective Question 1 (National Entrance Examination in 2003) It is known that under the conditions of 1×105 Pa and 298 K, 2 mol of hydrogen is generated by the combustion of water vapor to release 484 kJ of heat. The following thermochemical equation is correct () (A)H2O (g )=H2(g)+1/2O2(g)