37 calories. According to the public comment network, the calorie of one liter of Master Kong iced black tea (calculated by100g edible part) is 37 calories (154 kilojoules), which is lower in the same kind of food. Heat refers to the thermal interaction between the system and the outside world when the change of system state comes from the destruction of thermal balance conditions, that is, when there is a temperature difference between the system and the outside world.