In an experiment to determine the enthrall change for the reaction between zinc and copper sulfate, a cooling curve was used to estimate the temperature change. The zinc was added to the copper sulfate solution at 3.5 minutes and the results were plotted on a graph. What is the temperature change

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added