Question

31. An athlete takes 100 gm of glucose of energy
equivalent to 1560 kJ. How much amount of energy
is uptaken by 1 gm molecule of glucose?
(1) 15.6 kJ
(2) 2808 kJ
(3) 1560 kJ
(4) 28.08 kJ
​

Answer 1

The amount of energy is 2808 KJ

Given:

The amount of glucose taken by athlete = 100 gm

Amount of energy given by 100 gm of glucose = 1560 KJ

Solution:

1 g molecule of glucose means 1 mole of glucose. 1 mole is equivalent to the number of atoms present in one molecule of glucose. We know that the mass of 1 mole of glucose is 180 gm.

So, if 100 gm of glucose gives 1560 KJ of energy

1 gm of glucose gives,

of energy

The energy from 180 gm of glucose is given below:

100g of glucose gives 1560kJ

Question asks 1g-molecule of glucose which means 1 mole

So 180 g of glucose will give=180X1560/100=2808KJ

Answer 2

Answer:

The answer is (2) 2808 KJ.

Explanation is given in the above attachment.