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CH4、NH3、H2O、HF HF、H2O、NH3、CH4 H2O、HF、CH4、NH3 HF、H2O、CH4、NH3、
±0.20%CH4 ±0.10%CH4 ±0.01%CH4 ±0.05%CH4
≥1.0%CH4;≥1.0%CH44;<1.0%CH4 ≥1.5%CH4;≥1.5%CH44;<1.0%CH4 ≥1.0%CH4;≥1.5%CH44;<1.0%CH4 ≥1.5%CH4;≥1.0%CH44;<1.0%CH4
±0.20%CH4 ±0.10%CH4 真值的±10%CH4 真值的±20%CH4
≥1.0%CH4;≥1.0%CH4; ≥1.5%CH4;≥1.5%CH4; ≥1.0%CH4;≥1.5%CH4; ≥1.5%CH4;≥1.0%CH4;
“N2”、“N2-CO2”、“N2-CH4”、“CH4”; “CH4”、“N2-CH4”、“N2-CO2”、“N2”; “N2-CO2”、“N2”、“N2-CH4”、“CH4”; “CH4”、“N2-CH4”、“N2”、“N2-CO2”。
2.00%~3.00%CH4 3.00%~5.00%CH4 1.00%~2.00%CH4 2.00%~4.00%CH4
0.5%CH4 0.75%CH4 1.0%CH4 2.0%CH4
±0.1%CH4 ±0.2%CH4 0.1%CH4 0.2%CH4
0.04%CH4,0.4%CH4 0.1%CH4,0.4%CH4 0.02%CH4,0.4%CH4 0.1%CH4,0.5%CH4
报警浓度≥1.0%CH4 断电浓度≥1.0%CH4 断电浓度≥1.5%CH4 复电浓度<1.0%CH4
0.1%CH4,0.1%CH4 0.1%CH4,0.4%CH4 0.01%CH4,0.1%CH4 0.01%CH4,0.01%CH4
负极反应式为:CH4+10OH--8e=CO32-+7H2O 负极反应式为:O2+2H2O+4e=4OH- 随着放电的进行,溶液的pH不变 放电时溶液中的阴离子向正极移动
≥0.5%CH4,≥0.5%CH4,<0.5%CH4 ≥1.5%CH4,≥1.5%CH4,<1.5%CH4 ≥1.0%CH4,≥1.0%CH4,<1.0%CH4
该反应的焓变△H>0 图中Z的大小为a>3>b 图中X点对应的平衡混合物中 温度不变时,图中X点对应的平衡在加压后φ(CH4)减小
都是σ键,没有π键 都是π键,没有σ键 既有π键,又有σ键 除CH4外,都是σ键