安全关闭地震
参考答案:
safe shutdown earthquake美国核能控制协会专用术语,特指在不对公众造成危险的情况下能使核反应堆安全停止运转的最大地面震动(地震)。
(1)H2S的燃烧热△H=-akJ•mol-1,则H2S燃烧反应的热化学方程式为______.
(2)已知:高温下,在密闭容器中用H2还原WO2可得到金属钨.当温度过高时,WO2(s)会转变为WO2(g).请根据以下反应:
WO2(s)+2H2(g)⇌W(s)+2H2O(g);△H=+66.0kJ•mol-1
WO2(g)+2H2⇌W(s)+2H2O(g);△H=-137.9kJ•mol-1
计算出WO2(s)⇌WO2(g)的△H=______.
(3)工业上常利用天然气(主要成分为CH4)与CO2进行高温重整制备CO,反应的化学方程式为:
CH4+CO2=2CO+2H2
已知CH4、H2和CO的燃烧热分别为890.3kJ•mol-1、285.8kJ•mol-1、283.0kJ•mol-1,则生成1m3(标准状况)CO所需热量为______.
Directions:
There has been a discussion recently on the issue of challenge in a newspaper.Write an essay of about 200 words to the newspaper to
1. show your understanding of the symbolic meaning of the picture below
1) the content of the picture
2) the symbolic meaning
3) the special understanding
2. give a specific example/comment, and
3. give your suggestion as to the best way to treat challenge.