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INFORME PRÁCTICA 3 - Densidad y Viscosidad de líquidos
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INFORME PRÁCTICA 3 - Densidad y Viscosidad de líquidos, hecho en el laboratorio de física de la Universitat de Valencia
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PRÁCTICA 3.DENSIDAD Y VISCOSIDAD DE LÍQUIDOS
Cintia Romero y Manuel Lara
Grupo BL2
1. Objetivos:
• Comprender el concepto de densidad relativa y medir densidades relativas de líquidos
con la balanza de Mohr.
• Comprender el concepto de viscosidad y medir viscosidades dinámicas de líquidos con
el viscosímetro de Ostwald.
2. Datos experimentales:
• Todas las mediciones de la práctica han sido tomadas a una temperatura de 20,6 ± 0,1
ºC.
• Densidades relativas medidas con la balanza de Mohr:
Líquido Problema ρ (g/cm3) (± 0,001)
Agua 1
Etanol (1) 0.794
Etanol (2) 0.794
Etanol (3) 0.795
Acetona (1) 0.783
Acetona (2) 0.784
Acetona (3) 0.784
• Tiempo que el líquido problema tarda en fluir desde el punto C hasta el B en el
viscosímetro de Ostwald:
Líquido Problema T (s) (±0,01)
Etanol (1) 58.18
Etanol (2) 52.34
Etanol (3) 51.65
Acetona (1) 18.43
Acetona (2) 18.50
Acetona (3) 18.44
Agua (1) 29.22
Agua (2) 28.65
Agua (3) 28.57
3.Cálculos:
Densidad promedio del Etanol:
𝜌1+𝜌 2+𝜌 3 0.794 + 0.794 + 0.795
𝜌𝐸 = = = 0.794 𝑔/𝑐𝑚3
3 3
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