Question

When your body metabolizes sugar (glucose), 2.8 MJ of heat is produced for every mole of sugar that is burned. How much heat will be released when 0.25 moles of glucose in a can of soda is metabolized? Express your answer in kilojoules (kJ) using the correct number of significant figures.

Answer 1

Answer:
`7.0* 10^2kJ` will be released when 0.25 moles of glucose in a can of soda is metabolized

Step-by-step explanation:

Heat of combustion is the amount of heat released on complete combustion of 1 mole of substance.

Given :

Amount of heat released on combustion 1 mole of glucose = 2.8 MJ =
`2.8* 10^3kJ`
`1MJ=10^3kJ`

Thus we can say:

1 mole of glucose on combustion releases =
`2.8* 10^6J`

Thus 0.25 moles of glucose on combustion releases =
`(2.8* 10^3kJ)/(1)* 0.25=7.0* 10^2kJ`

Thus
`7.0* 10^2kJ` will be released when 0.25 moles of glucose in a can of soda is metabolized