For a specific work, on an average a person requires 5616 kJ of energy. How many kilograms of g

step 1 First of all, let's have a look what all is given in the problem. Given is for a specific work,

For a specific work, on an average a person requires 5616...

For a specific work, on an average a person requires $5616 \mathrm{~kJ}$ of energy. How many kilograms of glucose must be consumed if all the required energy has to be derived from glucose only? $\Delta H$ for combustion of glucose is $-2808 \mathrm{~kJ} \mathrm{~mol}^{-1}$. (a) $0.720 \mathrm{~kg}$ (b) $0.36 \mathrm{~kg}$ (c) $0.18 \mathrm{~kg}$ (d) $1.0 \mathrm{~kg}$

For a specific work, on an average a person requires $5616 \mathrm{~kJ}$ of energy. How many kilograms of glucose must be consumed if all the required energy has to be derived from glucose only? $\Delta H$ for combustion of glucose is $-2808 \mathrm{~kJ} \mathrm{~mol}^{-1}$.
(a) $0.720 \mathrm{~kg}$
(b) $0.36 \mathrm{~kg}$
(c) $0.18 \mathrm{~kg}$
(d) $1.0 \mathrm{~kg}$

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Molecular Mass Calculation

This involves using the molecular mass of a compound to convert from moles to mass. By multiplying the number of moles by the molecular weight, one can determine the mass of a substance required or produced in a chemical reaction.

Enthalpy Change in Combustion

Enthalpy change (?H) during combustion indicates the amount of energy released or absorbed when a substance is burned. In such calculations, knowing the ?H per mole of a substance, such as glucose, is essential to compute the total energy produced or required in a given reaction.

Energy Conversion

This concept involves converting energy values from one form to another, such as linking the energy released per mole during a chemical reaction (in kJ/mol) to the total energy requirement. It is a critical step in determining how many moles of a substance are necessary to supply a given amount of energy.

Mole Concept

The mole is a fundamental unit in chemistry that expresses amounts of a chemical substance. It allows the conversion of macroscopic quantities (like grams or kilograms) into the number of individual molecules, atoms, or formula units, facilitating calculations involving chemical reactions.

Transcript

Please give Ace some feedback