One side of a wall is maintained at 400 K and the other

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One side of a wall is maintained at 400 K and the other at 300 K. The rate of heat transfer through the wall is 1000 W and the surrounding temperature is 25°C. Assuming no generation of heat within the wall, the irreversibility (in W) due to heat transfer through the wall is.

1. 248.33 watt.
2. 246.33 watt.
3. 247.33 watt.
4. 249.33 watt.

Correct Option: A

T₀ = 273 + 25 = 298 K
AE₁ = a₁ – T₀ S₁

AE₁ = 1000 - 298 ×	1000	= 225 watts
	400

AE₂ = a₂ - T₀ S₂

AE₂ = 1000 - 298 ×	1000	= 6.67 watts
	300

∆ AE = AE₂ - AE₁