Joule, lower heating value (thermo-06)

Determine the lower heating value of brennsprit ('Spiritus') from the following information: 500 grams of water are heated by 1 grams of brennsprit from 20.4℃ to 22.7℃
Note: the lower heating value H is in [translation unavailable] (or kJ) per kg indicated

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• October 16, 2026 at 4:43 am #9550
    Exercise: thermo-06    

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  Determine the lower heating value of brennsprit ('Spiritus') from the following information: 500 grams of water are heated by 1 grams of brennsprit from 20.4℃ to 22.7℃
  Note: the lower heating value H is in [translation unavailable] (or kJ) per kg indicated

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    Exercise: thermo-06    

  ⓘ    🔄 Reload     🖨️ print           ◀  –   ▶     ?! Question/Answer ?!

  Determine the lower heating value of brennsprit ('Spiritus') from the following information: 500 grams of water are heated by 1 grams of brennsprit from 20.4℃ to 22.7℃
  Note: the lower heating value H is in [translation unavailable] (or kJ) per kg indicated

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  October 16, 2026 at 4:43 am #9551
  Solution:

  1. The abbreviation S stands for Spiritus
  2. Also from considering the units (right side of the equation in Joule, so the left side must also be in J)
  3. H·m_S = m_w·c_w·ΔT
  4. H = m_w·c_w·ΔT / m_s = 0.5 kg · 4182 J/kgK · 2.3 K / 0.001 kg = 4'809300 J/kg = 4809 kJ/kg

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