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A 5m X 8m X 0.3m size concrete slab ( ρ = 2200 kg/m3, CP = 0.88 kJ/kg-K) is used as thermal storage mass in solar heated house. If slab cools overnight from 230C to 180C in 180C house, what will be the net entropy change associated with process?
  • a)
    395.8 kJ/K
  • b)
    265 kJ/K
  • c)
    49.6 kJ/K
  • d)
    3.4 kJ/K
Correct answer is option 'D'. Can you explain this answer?
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A 5m X 8m X 0.3m size concrete slab ( ρ = 2200 kg/m3, CP = 0.88 kJ...
Answer is (d)
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Most Upvoted Answer
A 5m X 8m X 0.3m size concrete slab ( ρ = 2200 kg/m3, CP = 0.88 kJ...
5 meters long, 8 meters wide, and 0.3 meters thick) would have a volume of:

Volume = Length x Width x Thickness
Volume = 5m x 8m x 0.3m
Volume = 12 cubic meters
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Community Answer
A 5m X 8m X 0.3m size concrete slab ( ρ = 2200 kg/m3, CP = 0.88 kJ...
Ds=26400 (.88ln (291/296)+.88 (296-291)/291)
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A 5m X 8m X 0.3m size concrete slab ( ρ = 2200 kg/m3, CP = 0.88 kJ/kg-K) is used as thermal storage mass in solar heated house. If slab cools overnight from 230C to 180C in 180C house, what will be the net entropy change associated with process?a)395.8 kJ/Kb)265 kJ/Kc)49.6 kJ/Kd)3.4 kJ/KCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about A 5m X 8m X 0.3m size concrete slab ( ρ = 2200 kg/m3, CP = 0.88 kJ/kg-K) is used as thermal storage mass in solar heated house. If slab cools overnight from 230C to 180C in 180C house, what will be the net entropy change associated with process?a)395.8 kJ/Kb)265 kJ/Kc)49.6 kJ/Kd)3.4 kJ/KCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 5m X 8m X 0.3m size concrete slab ( ρ = 2200 kg/m3, CP = 0.88 kJ/kg-K) is used as thermal storage mass in solar heated house. If slab cools overnight from 230C to 180C in 180C house, what will be the net entropy change associated with process?a)395.8 kJ/Kb)265 kJ/Kc)49.6 kJ/Kd)3.4 kJ/KCorrect answer is option 'D'. Can you explain this answer?.
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