1. What is the in internal energy when a system releases 75 Jof heat energy and does 54 J of work on its surroundings?
2. What is the final temperature of the water? Assume that no heat is lost to or gainedfrom the surroundings. Specific heat capacity of nickel 0.444J/(g.K).
3. How many calories are in 756.5 kJ(1 cal = 4.184 J)?