On a clear night, when the effective blackbody temperature of the space is - 30°C, the air contains water vapor at a partial pressure equal to that of ice or liquid water at 0°C. A very thin film of water, initially at 20°C, is placed in a very shallow well-insulated pan, placed in a spot sheltered from the wind with a full view of the sky. If hc = 2.6 W/m². °C, state whether ice will form, supporting the conclusion with suitable calculations.

On a clear night, when the effective blackbody temperature of the space is - 30°C, the air contains water vapor at a partial pressure equal to that of ice or liquid water at 0°C. A very thin film of water, initially at 20°C, is placed in a very shallow well-insulated pan, placed in a spot sheltered from the wind with a full view of the sky. If hc = 2.6 W/m². °C, state whether ice will form, supporting the conclusion with suitable calculations.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter11: Heat Transfer By Radiation

Section: Chapter Questions

Problem 11.67P

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