Aplicação da análise de regressão linear na estimativa da energia de ativação de fluxo dos ácidos oleico e palmítico

Abstract

The sensitivity of viscosity due to temperature rise is indicated by the activation energy of flow, so that the larger the value of the activation energy of flow, the greater the influence of the temperature on the viscosity. The objective of this work was to estimate the activation energy of flow of oleic and palmitic acids between 70 and 100oC. The values of the activation energy of flow were determined from the linear regression analysis of data viscosity (estimated by Andrade's equation and model proposed by GONZALEZ et al. (1999)) as a function of the temperature. The values found for the activation energy of flow of oleic acid were 22.948 kJ.mol -1 (based on Andrade's equation) and 22.477 kJ.mol -1 (based on the model proposed by GONZALEZ et al. (1999)). For palmitic acid, the values found were 23.152 kJ.mol -1 (based on Andrade's equation) and 23.118 kJ.mol -1 (based on the model proposed by GONZALEZ et al. (1999)). In all cases