Question

A person inhales 640 g of O2 per day. If all the O2 is used for converting sugar into CO2 and H2O. 'x' kg of sugar (C12H22O11) is consumed in the body and the heat liberated is y×103 kJ. Heat of combustion of C12H22O11 is −5640 kJ/mol.Find x __​

Answer 1

Answer:

C

12

H

12

O

11

+12O

2

⟶12CO

2

+11H

2

O;ΔH=−5645kJ

Moles of O

2

used per day =

32

640

=20

∴ Moles of sucrose used per day or for 20 mole O

2

=

12

20

mol=

12

20

×342 g=570g.

Also, ΔH=

12

5645×20

=9408.34kJ.

Explanation:

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