HEAT EXCHANGE 6. How many joules of heat are released by 50.0 g of steam at 100.0'C when it condenses? /13, 020 J 7. How many joules of energy are used to vaporize 20.0 kg of water at a tem- perature of 100.0*C? 4.52 71075 8. Calculate the number of joules evolved when 4.00 kg of steam at a perature of 100'C is condensed, cooled, and then changed to ice at 0.00.C. /2:40, 4703 9. How many grams of mercury can be vaporized at its boiling point, 356.58*C, by the addition of 4.19 x 103 J? 14.25 10. What is the final temperature attained by the addition of 11,4 g of steam at 100.0'C to 681.0 g of water at a tem- perature of 25.0'C in an aluminum calorimeter having a mass of 182.0 g? CHAPTER 8