notes:**specific heat (J/g-C)Aluminum, Specific Heat .897Copper, Specific Heat .385Iron, specific heat .449Lead specific heat .129Water, Specific heat 4.18questions:1.How much heat is needed to heat 20 grams of lead from 20C to 150C?2. A 300-gram bar of aluminum has to be heated from 25C to 75C. How many calories are needed to achieve this temperature increase?
Q 20 x 0.129( 150 - 20)335.4 J Q 300 x 0.897 ( 75 - 25)13455 J 3215.8 cal
