Thermal Conduction Homework: Oven Glass Heat Flow in 1hr

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    Conduction Thermal
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Homework Help Overview

The problem involves calculating the quantity of heat that flows through a piece of glass in an oven door, given specific dimensions, thickness, and thermal conductivity. The context is thermal conduction, focusing on heat transfer through materials.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to apply the heat transfer equation but questions the discrepancy between their calculated result and the provided answer. Participants inquire about the temperature of the kitchen and whether a zero-degree Celsius assumption was made for the external temperature.

Discussion Status

The discussion is ongoing, with participants exploring different assumptions regarding external temperature and its impact on the heat transfer calculation. No consensus has been reached, and various interpretations of the problem are being examined.

Contextual Notes

There is a lack of information regarding the external temperature, which is critical for the calculation. The original poster's assumption about the kitchen temperature is under scrutiny.

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Homework Statement


The door of an oven has a piece of glass of dimensions 20cm X 30 cm and thickness 0.50cm.when the interior of the oven is at temperature 200°C,determine the quantity of heat that flow through the glass in one hour.(for glass,K=0.80 Wm^-1K^-1)


Homework Equations


Q=tkA(θ2-θ1) /x


The Attempt at a Solution


Q=(3600)(0.80)X(0.2x0.3)(200) / (0.50 x 10^-2)

THe answer given is 6.2MJ.i get 6.9MJ.WHY?please help me to solve this question.
 
Physics news on Phys.org
What is the temperature of the kitchen?
 
the question din given
 
So you assumed zero °C rather than a typical room temperature?
 

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