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本文用统计热力学的方法,建立了液体饱和蒸气 p与内压 p_1间的关系式p=p_1/σexp(-(p_iV_m)/(nRT)),式中σ是一个依赖于液体密度或摩尔体积 V_m 的因子,它与 V_m 的关系如下lnσ=1/2ln(V_m~2/(V_m~2-AV_m+B))+A/(4B-A~2)~(1/2)tg~(-1)((2V_m-A)/(4B-A~2)~(1/2))-6.60,n、A 和 B 都是液体的特性常数.对 C_6H_6、CCl_4、cy-C_6H_(12)、C(CH_3)_4、n-C_6H_(14)和(CH_3)_2CO 等六种液体的检验结果表明,上述关系式能适用于广阔的温度范围.
In this paper, the relationship between liquid saturated vapor p and internal pressure p_1 is established by statistical thermodynamics method, p = p_1 / σexp (- (p_iV_m) / (nRT)), where σ is a function dependent on liquid density or molar volume V_m (V_m ~ 2 / (V_m ~ 2-AV_m + B)) + A / (4B-A ~ 2) ~ (1/2) tg ~ (-1) (2V_m-A) / (4B-A ~ 2) ~ (1/2)) - 6.60, n, A and B are the constants of the liquid.For C_6H_6, CCl_4, cy_C_6H_ (12), C (CH_3) _4, n-C_6H_ (14) and (CH_3) _2CO and other liquid test results show that the above formula can be applied to a wide temperature range.