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If 150 kJ of energy is needed for muscul...

If `150 kJ` of energy is needed for muscular work to walk a distance of one km, than how much of gulcose one has to consume to walk a distance of five km, provided only `30%` energy is available for muscular work.The enthalpy of combustion of glucose is `3000 kJ mol^(-1)`

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Energy consumed for walking a distance of` 5km = 150 xx5kJ = 750 kJ`
1 mole of glucose `C_(6)H_(12)O_(6)(180 g)` gives theoretically energy = 3000 kJ
Actual energy available `= 30/100xx3000 = 900 kJ`
Thus fo 900 kJ of energy, glucose required `= 180 g`
`therefore` For 750 kJ of energy glucose required `= 180/900 xx750 = 150 g`.
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