This question refers to a lab that we did for determining the HHV value of bio diesel fuel. We are asked if the experiment was done using a higher initial temperature than the bomb was calibrated for, how would this affect the HHV determined? The room temperature is assumed to be the same in both cases. Our logic says that if the bomb is not 100% insulated, then more heat would be lost to the surroundings, and thus a lower value for HHV would result. Is this correct? Looking at some results online, it seems that a higher value was found with higher initial temperatures. So I need some input from the experts here; it would be greatly appreciated.