At 298K the standard enthalpy of combustion of sucrose is -5797kJ mol-1 and the standard Gibbs energy reaction is -6333kJ mol-1. Estimate the additional non-expansion work that may be obtained by raising the temperature to blood temperature, 37OC.

Calculation of change in entropy: ∆G=∆H-T∆S-6333 kJ mol-1=-5797 kJ mol-1-(298×∆S)-536 kJ…

Answered: At 298K the standard enthalpy of…

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter18: Principles Of Chemical Reactivity: Entropy And Free Energy

Section18.5: Entropy Changes And Spontaneity

Problem 3RC

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At 298K the standard enthalpy of combustion of sucrose is -5797kJ mol^-1 and the standard Gibbs energy reaction is -6333kJ mol^-1. Estimate the additional non-expansion work that may be obtained by raising the temperature to blood temperature, 37^OC.

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Calculation of change in entropy:

$\begin{array}{rcl} ∆ G & = & ∆ H - T ∆ S \\ - 6333 kJ {mol}^{- 1} & = & - 5797 kJ {mol}^{- 1} - (298 \times ∆ S) \\ - 536 kJ {mol}^{- 1} & = & - (298 \times ∆ S) \\ ∆ S & = & 1.79866 kJ {mol}^{- 1} K^{- 1} \end{array}$

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