The enthalpy change involved in the oxidation of glucose is -2880 kJ mol^-1. Twenty five per c

step 1 We are given that the entropy change in oxidation of glucose delta h is given as minus 2880 kilo

The enthalpy change involved in the oxidation of glucose is...

The enthalpy change involved in the oxidation of glucose is $-2880 \mathrm{~kJ} \mathrm{~mol}^{-1}$. Twenty five per cent of this energy is available for muscular work. If 100 kJ of muscular work is needed to walk one kilometre, what is the maximum distance that a person will be able to walk after consuming 120 g of glucose? (a) 7.9 km (b) 9.7 km (c) 4.8 km (d) 8.4 km

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Key Concepts

Enthalpy Change

Enthalpy change is a thermodynamic quantity that represents the total heat released or absorbed during a chemical reaction at constant pressure. It is a measure of the energy change in a system and is fundamental in understanding energy transformations in chemical processes.

Stoichiometry

Stoichiometry involves the quantitative relationships between reactants and products in a chemical reaction. It allows one to convert the amount of a substance (in grams, moles, etc.) into the corresponding energy change or quantity of another substance, making it essential for linking mass to energy.

Energy Conversion Efficiency

Energy conversion efficiency pertains to how much of the total energy released in a process is converted into useful work. In the context of biological systems, only a fraction of the energy obtained from chemical reactions is harnessed for tasks, such as movement, while the remainder is lost as heat or in other forms.

Energy and Work Relationship

The relationship between energy and work is a core concept of physics, where work is defined as the transfer of energy. Understanding this relationship is crucial when determining how much 'mechanical work' can be achieved using the energy provided from chemical reactions, and it is often quantified to assess fuel or energy source effectiveness.

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