* How many joules of heat are required to heat 125 g aluminum from 19.0 degree Celsius to 95.5 degree Celsius? * A 135 g sample of a metal requires 2.50 kJ to change its temperature from 19.5 degree Celsius to 100.0 degree Celsius. What is the specific heat of the metal?

* A 100.0 g sample of copper is heated from 10.0 degree Celsius to 100 degree Celsius.
a) Determine the number of Joules needed.

b) The same amount of heat is added to 100.0 g of aluminum initially at 10.0
degree Celsius. What is the final temperature of the aluminum?

c) Which metal got hotter, the copper or aluminum?

(20) A sample of iron was heated to 125.0 degree Celsius, then placed into 375.0 g of water initially at 19.8 degree Celsius. The final temperature of both was 25.6 degree Celsius. How much grams of iron were in the sample?

(21) The specific heat of a human is approximately 3.47 J/g degree Celsius and normal body temperature is 37.0 degree Celsius.
a) If a 165.0 lb person eats a candy bar containing 262.0 Cal, how much will their
body temperature increase if all the calories from the candy are converted into
heat energy?
b) If a 165.0 lb person eats candy bar containing 25.0 Cal, how much will their
body temperature increase if all the calories from the candy are converted into
heat energy