Thermodynamics Heat Radiation Problem

AI Thread Summary
The discussion revolves around solving a thermodynamics problem related to heat radiation from an automobile hood. The user is trying to determine the temperature (T1) of the hood, given its emissivity, specific heat, area, and mass, while considering heat loss to the environment. They express confusion about calculating Q/T and seek alternative equations to find the necessary values. Additionally, there is a mention of potentially missing information regarding the power of sunlight impacting the hood. Clarification on these points is essential for solving the problem effectively.
astral87
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Hi everyone, I am unsure about how to solve this problem. I believe i have the right equation but I'm confused about how I can find Q/T with the information I am given. Is there another equation I can use?

Homework Statement



Assume the steel in the body of an automobile has an emissivity of 0.3 and a
specific heat of 450 J/Kg-degreeC. Take the area of the hood of the
automobile directly exposed to the sun as 3.5 square meters, and its mass
as 24.0 kg. What temperature will the top of the hood reach, assuming it
lost heat by radiating to its surrounding environment, which is at 20 degreesC?

Homework Equations



Q/T= eθA(T1^4-T2^4)
θ (Stefan-Boltzmann Constant) = 5.67 x 10^-8

The Attempt at a Solution



Q/T = (0.30)(5.67x10^-8 w/M2-K4)(3.5M2)[(T1^4-293.15^4 K)

I am searching for T1, anyone know how I can find Q/T? Maybe from another equation but I'm not sure which one.

Any help is appreciated, thank you!
 
Last edited:
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There seems to be missing info re the power of the sunlight.
 
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