Thermal conduction

  • Thread starter hoyy1kolko
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  • #1
hoyy1kolko
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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.

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
gneill
Mentor
20,945
2,886
What is the temperature of the kitchen?
 
  • #3
hoyy1kolko
10
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the question din given
 
  • #4
gneill
Mentor
20,945
2,886
So you assumed zero °C rather than a typical room temperature?
 

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