To cool a piece of glass, initially at a temperature of 93°C, it is immersed in an aluminum tray, initially filled (to the brim) with water at 12°C. Assuming that the assembly (tray + water + glass piece) is an isolated system, determine the final temperature of the glass piece. Data: Glass piece Shape: solid parallelepiped Dimensions: L = 1.2 m, L = 0.6 m and h = 0.5 m Density: 2490 kg/m3 Constant pressure mass heat: 840 J.kg-1.K-1 Initial temperature: 93°C Aluminum tray Shape: hollow block without lid External dimensions: L = 2 m, W = 1 m, h = 0.8 m Wall thickness: e = 12 mm Density: 2800 kg/m3 Constant Pressure Mass Heat: 910 J.kg-1.K-1 Initial Temperature: 12°C Water Density: 1000 kg/m3 Constant pressure mass heat: 4180 J.kg-1.K-1 Initial temperature: 12°C
To cool a piece of glass, initially at a temperature of 93°C, it is immersed in an aluminum tray, initially filled (to the brim) with water at 12°C. Assuming that the assembly (tray + water + glass piece) is an isolated system, determine the final temperature of the glass piece.
Data:
Glass piece
Shape: solid parallelepiped
Dimensions: L = 1.2 m, L = 0.6 m and h = 0.5 m
Density: 2490 kg/m3
Constant pressure mass heat: 840 J.kg-1.K-1 Initial temperature: 93°C
Aluminum tray
Shape: hollow block without lid External dimensions: L = 2 m, W = 1 m, h = 0.8 m Wall thickness: e = 12 mm
Density: 2800 kg/m3
Constant Pressure Mass Heat: 910 J.kg-1.K-1 Initial Temperature: 12°C
Water
Density: 1000 kg/m3
Constant pressure mass heat: 4180 J.kg-1.K-1 Initial temperature: 12°C
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