摘要
利用公式ΔGo+RTlnKop=0.1196n/λ计算了不同波长条件下NO光解反应的标准平衡常数.当波长为183 nm和230 nm时,反应NO+hv→N.+O.的标准平衡常数分别为3.64×109和1.45×10-14;当波长为230 nm时,反应2NO+hv→N2+O2的标准平衡常数为e279.72.解释了为什么NO吸收λ<183 nm的光子后解离为游离态的氮原子和氧原子,而吸收λ<230 nm的光子后形成激发态分子NO*,进而与NO反应形成N2和O2.
The standard equilibrium constants of NO photolytic reactions were calculated by the formula △G^0+RTlnKp^0=0.1196n/A. When light wavelengths (λ) were 183nm and 230nm respectively, the standard equilibrium constants of the reaction NO + hv→N·+O· were 3.64 ×10^9 and 1.45×10^-14 in order. When light wavelength (λ) was 230nm, the standard equilibrium constant of the reaction 2NO + hv→N2 + O2 was e^279.72. The results explained the reason why NO was decomposed into N· and O· directly after it absorbed photons when λ 〈 183nm, but it was first changed into NO^* after it absorbed photons when λ 〈 230nm, and then NO^* was changed into N2 and O2 in reaction with NO.
出处
《辽宁大学学报(自然科学版)》
CAS
2005年第4期296-298,共3页
Journal of Liaoning University:Natural Sciences Edition
关键词
光化反应
平衡常数
波长
photochemical reaction
equilibrium constant
wavelength.