Question

A person requires `2870kcal` of energy to lead normal daily life. If heat of combustion of cane sugar is `-1349kcal`, then his daily comsumption of sugar is `:`
A. 728 g
B. 0.728 g
C. 342 g
D. 0.342 g

Answer 1

Correct Answer - A
`C_(12)H_(22)O_(11)+12O_(2)rarr12CO_(2)+11H_(2)O , Delta H_("Comb.")=-1349 kCal`
1344 KCal heat is produced by 1 mole sugar,
`therefore` 2870 KCal at heat is produced by
`((1)/(1349)xx2870)` mol sugar
`therefore` Mass of sugar `=(1)/(1349)xx2870xx342 g`
= 728 g