4.25 consider the combustion of sucrose: c12h22o11(aq) + 12 o2(g) 7 12 co2(g) + 11 h2o(l) (a) combine the standard reaction entropy with the standard reaction enthalpy and calculate the standard reaction gibbs energy at 298 k. (b) in assessing metabolic processes, we are usually more interested in the work that may be performed for the consumption of a given mass of compound than the heat it can produce (which merely keeps the body warm). recall from chapter 2 that the change in gibbs energy can be identifi ed with the maximum nonexpansion work that can be extracted from a process. what is the maximum energy that can be extracted as (i) heat and (ii) nonexpansion work when 1.0 kg of sucrose is burned under standard conditions at 298 k?