Chemical Engineering - Heat Transfer - Discussion

Discussion Forum : Heat Transfer - Section 2 (Q.No. 45)
45.
Pick out the wrong statement:
With change in temperature, the radiant energy emitted by a black body remains unchanged.
Absorptivity of a body approaches unity in case of diffuse reflection.
Absorptivity of a perfectly black body is unity.
Value of Stefan-Boltzman constant is 4.876 x 10-8 KCal/m2.hr.°K4.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
7 comments Page 1 of 1.

Ravi said:   9 years ago
It is stefen bolzman law that Eb is propotional to T trest to 4.

Sameer said:   9 years ago
The value of Stefan-Boltzmann law is;

5.67x10^-8.

Anaya said:   7 years ago
D is the right answer.

Kostov said:   6 years ago
D is not the correct answer, value given is correct. Check the units.
(2)

Solanki Savan said:   5 years ago
D is the right answer.
(1)

@Aj said:   3 years ago
Stefan-Boltzmann constant = 4.876 x 10^-8 KCal/m2.hr°K4.
= 5.67* 10^-8 (W/(m2 x K4).

Jithin said:   2 years ago
D is the right answer.

The value of Stefan Boltzman's constant is 5.670 374 419 x 10-8 W m^-2 K^-4.

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