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Question

The enthalpy change involved in the oxidation of glucose is 2880 kJ/mol. 25% of this energy is available for muscular work. If 100 kJ of muscular work is required to walk 1 km, calculate the maximum distance that can be covered by a person who as consumed 120 g of glucose
  1. 7.9 km
  2. 9.7 km
  3. 4.8 km
  4. 8.4 km


Solution

The correct option is C 4.8 km
Energy released by 120 g [12080moles] of glucose=2880×12080=1920kJ
Energy available for muscular work = 25100×1920=480kJ
100kJ of energy is required to walk=1km
480kJ of energy is required to walk=4.8km

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