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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

75g

B

30g

C

180g

D

150g

Text Solution

Verified by Experts

The correct Answer is:
d
Energy consumed for walking a distance of5 km `= 150 xx5kJ =750 kJ`
1 mole of glucose , `C_(6)H_(12)O_(6) ( 180g)` gives theoretically energy `= 3000kJ`
Actual energy available`= ( 30)/( 100) xx 3000 = 900 kJ`
Thus, for 900kJ of energy , glucose required `= 180 g`
`:. `For 750 kJ of energy , glucose required `= ( 180)/( 900) xx750 g = 150 g`
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