Flash points are determined experimentally by heating the liquid in a container and then introducing a small flame just above the liquid surface. The temperature at which there is a flash/ignition is recorded as the flash point. Two general methods are called closed-cup and open-cup. The closed-cup method prevents vapors from escaping and therefore usually results in a flash point that is a few degrees lower than in an open cup.
There are two methods for roasting a whole chicken: Regular method: 1  Preheat oven to 350 degrees F (175 degrees C). 2  Roast whole (thawed) chickens for 20 minutes per pound, plus an additional 15 minutes.
Hence, if you want to prepare a chicken roast to serve 4 â 5 people, you would require about 5 lb meat and a total cooking time of 1 hour 50 minutes. Some people, however, prefer to roast the chicken on high heat of about 450 degrees F for the first and last 15 minutes (a total time of half an hour).n order to prepare roasted chicken, you need to first preheat the oven to 350 degrees F. The time needed to roast a chicken varies with the thickness of the meat. A large chicken could even take about 2 hours to fully get roasted.