Ido not understand a thing. i will mark brainilest answer. 4. during the testing of a new car engine, researchers found the engine produced 45,400 kj of heat when run for an hour. the antifreeze system has a capacity of 8.45 l and is filled with an antifreeze mixture (specific heat of 8.65 j/g oc, density of 1.027 g/ml). the purpose of the antifreeze system is to keep the engine cool, and in this experimental test, the engine temperature changed from 85oc to 101oc. during this hour long experiment, how many times did the cooling system turn over its volume of antifreeze to keep the engine temperature steady?