Data/hora: 13/06/2024 05:06:41

Provedor de dados: | 1
País: | Brazil
Título: | Thermodynamic properties of water desorption of forage turnip seeds
Autores: | Sousa, Kelly Aparecida; Resende, Osvaldo; Goneli, André Luis Duarte; Smaniotto, Thaís Adriana de Souza; Oliveira, Daniel Emanuel Cabral de.
Data: | 2014-11-25
Ano: | 2014
Palavras-chave: | Ciências Ágrarias; Armazenamento de produtos agrícolas hygroscopic equilibrium; Isosteric heat; Gibbs free energy; Compensation theory Ciências Ágrarias; Armazenamento de produtos agrícolas.
Resumo: | The purpose of this study was to determine the thermodynamic properties of the process of water sorption in forage turnip  seeds. The equilibrium moisture content of forage turnip  seeds was determined by the gravimetric-dynamic method for different values of temperature and water activity. According to the results, increasing the moisture content increases the energy required for the evaporation of water in forage turnip seeds, and the values of integral isosteric heat of desorption, within the moisture content range of 3.33 to 11.30 (% d.b.), varies from 4,222.70 to 2,870.34 kJ kg-1. With the elevation in the equilibrium moisture content, there is an increase in differential entropy and Gibbs free energy, which has positive values, demonstrating non-spontaneity in the process of desorption in the seeds. The theory of enthalpy-entropy compensation can be satisfactorily applied to the sorption phenomenon, and the process of water desorption of forage turnip seeds is controlled by enthalpy.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19333

10.4025/actasciagron.v37i1.19333

Editor: | Universidade Estadual de Maringá

Relação:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19333/pdf_47

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/downloadSuppFile/19333/5427

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/downloadSuppFile/19333/5428

Formato: | application/pdf

Fonte:

Acta Scientiarum. Agronomy; v. 37, n. 1 (2015); 11-19

Acta Scientiarum. Agronomy; v. 37, n. 1 (2015); 11-19

1807-8621

1679-9275