Chemical Engineering - Heat Transfer - Discussion
Discussion Forum : Heat Transfer - Section 5 (Q.No. 8)
8.
A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ?
Discussion:
5 comments Page 1 of 1.
Devashish said:
1 decade ago
Temperature is inversely proportional to surface area.
High surface area = cools fast.
Sphere haves smallest surface area than cube and cylinder.
So it cools slowly.
High surface area = cools fast.
Sphere haves smallest surface area than cube and cylinder.
So it cools slowly.
(1)
Oluchukwu Oyeka said:
1 year ago
You're correct @Devashish.
A large surface area enhances the rate of a reaction.
A large surface area enhances the rate of a reaction.
Dhanendra singh said:
1 year ago
As per my knowledge, the right answer is option A.
Thosin said:
11 months ago
The sphere having the lowest surface area will cool the slowest.
Mongam Damodhar Rao said:
10 months ago
Given it is a plate not a cylinder, total surface area of the plate should be less. So, the correct option is B.
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