1) There seem to be many stable compounds with the chemical formula C4H4O4. Choose one of them, and look up the enthalpy of combustion at a reputable website, namely the NIST Chemsitry Webbook . Calculate the internal energy of combusion c,mE as we would measure it with a bomb calorimeter. 2) The net reaction of photosynthesis is the reverse of the combustion of a carbohydrate, for example glucose: 6CO2(g)+6H2O(l)+lightC6H12O6(s)+6O2(g) a) Calculate the standard enthalpy of reaction using data tabulated in the back of Bio-Atkins (Resource section 3) or the equation sheet. b) Photosynthesis requires 12 photons (at a wavelength of 554nm ) to reduce 1 molecule of CO21 Use this information, together with answer (a), to calculate the maximum possible photosynthetic energy efficiency. As always, efficiency=what-you-pay-forwhat-you-get 1) There seem to be many stable compounds with the chemical formula C4H4O4. Choose one of them, and look up the enthalpy of combustion at a reputable website, namely the NIST Chemsitry Webbook . Calculate the internal energy of combusion c,mE as we would measure it with a bomb calorimeter. 2) The net reaction of photosynthesis is the reverse of the combustion of a carbohydrate, for example glucose: 6CO2(g)+6H2O(l)+lightC6H12O6(s)+6O2(g) a) Calculate the standard enthalpy of reaction using data tabulated in the back of Bio-Atkins (Resource section 3) or the equation sheet. b) Photosynthesis requires 12 photons (at a wavelength of 554nm ) to reduce 1 molecule of CO21 Use this information, together with answer (a), to calculate the maximum possible photosynthetic energy efficiency. As always, efficiency=what-you-pay-forwhat-you-get