An iron bar weighing 10.0 grams is heated to 450 °C, then submerged in 50.0 grams of water at 20.0 °C. If the final temperature of this mixture is 30.0 °C, what is the specific heat of iron in calories/g x °C? Assume no heat or steam is lost to the surroundings and the specific heat of water is 1.00 cal/g x °C.
(1) 0.0821
(2) 0.119
(3) 0.788
(4) 0.333
(5) 3.85
(6) 6.92