A very long, wide sheet of plastic 4 mm thick and initially at 20C is suddenly exposed

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A very long, wide sheet of plastic 4 mm thick and initially at 20°C is suddenly exposed on both sides to an atmosphere of steam at 102°C.

(a) If there is negligible thermal resistance between the steam and the surfaces of the plastic, how long will it take for the temperature at the centerline of the sheet to change significantly?

(b) What would be the bulk average temperature of the plastic at this time? For the plastic, k = 0.138 W/m-°C and α = 0.00035 m²/h.

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Unit Operations Of Chemical Engineering

ISBN: 9780072848236

7th Edition

Authors: Warren McCabe, Julian Smith, Peter Harriott

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Question Posted: Oct 20, 2023 02:45 AM

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A very long, wide sheet of plastic 4 mm thick and initially at 20C is suddenly exposed

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a Time required for the temperature at the centerline of the sheet to change significantly To estima...View the full answer

Unit Operations Of Chemical Engineering

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