A good yield of photosynthesis for agricultural crops in bright sunlight is 20 kg of carbohydrate (for example, sucrose) per hectare per hour. (1 hectare = 10 4 m 2 ). The net reaction for sucrose formation in photosynthesis can be written 12CO2(g) + 11H2O(l)S C12H22O11(s) + 12O2(g) . a. Use standard enthalpies of formation to calculate D r H ° for the production of 1 mol of sucrose at 25°C by the reaction above. b. Calculate the energy equivalent of photosynthesis that yields 20 kg of sucrose (hectare −1 h −1 ) . c. Bright sunlight corresponds to radiation incident on the surface of Earth at about 1 kW m −2 . What percentage of this energy