Question

A person require 2870 kcal of energy to lead daily life if heat of combustion is -1349 kcal, then his daily consumption of sugar is

Answer 1

Answer:

L moles of cane sugar produced=1349kcal

No of moles of cane sugar required per day=$\frac{2870}{134g}$

Amount of sugar required=$\frac{2870}{134g} *342$

                                          =727.6g

Answer 2

His daily consumption of sugar is, 728.1 g

Explanation :

As we are given that a person needs 2870 kcal of energy to lead daily life and the heat of combustion is -1349 kcal/mol.

Now we have to determine his daily consumption of sugar.

As, number of moles required in 1349 kcal energy = 1

So, number of moles required in 2870 kcal energy = $\frac{2870}{1349}$

                                                                                     = 2.127 mole

Amount of sugar required = Moles × Molar mass of sugar

Molar mass of sugar = 342.3 g/mol

Amount of sugar required = 2.127 mol × 342.3 g/mol

Amount of sugar required = 728.1 g

Thus, his daily consumption of sugar is, 728.1 g

Learn more about : unitary method

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