Final answer:
To calculate the energy of roasting on a sample energy scoring sheet, one should divide the total energy of the roast by the total mass of roasted beans and multiply by the mass of roasted beans used in the brew, repeating this process for each roast.
Step-by-step explanation:
To calculate the energy of roasting for a sample energy scoring sheet, we need to incorporate the amount of energy used for each roast in relation to the amount of roasted beans used in the brew. This calculation is determined by taking the total energy of the roast, dividing it by the total mass of roasted beans, and then multiplying by the mass of roasted beans actually used in the brew. This process should be summed for each roast used.
An example of calculating energy for food can be seen when determining caloric content. The caloric content of food is found using measurements such as in bomb calorimetry, where a food sample is burned to measure the energy it contains. Alternatively, an indirect method like indirect calorimetry can be used, which measures the volume of oxygen required to burn the food and calculates the caloric value based on oxygen utilization.
For instance, to determine caloric content on food labels, the Atwater system is often utilized. It averages the caloric content of protein, carbohydrate, and fats, based on bomb calorimetry results, and after considering indigestible components like fiber content, calculates the total energy.