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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)`

A

`75 g`

B

`30 g`

C

`180g`

D

`150g`

Text Solution

Verified by Experts

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