Name: Date: Period:
Ch 11 Worksheet 2 -
May 6, 2008
1.
A sample of mercury is heated from 25.5

C to 52.5

C. In the process, 782 J of heat are absorbed. What mass of mercury was in the sample? The specific heat of mercury is 0.138 J/g

C.
2.
A piece of erbium metal weighing 100.0 g and heated to 95.0

C is dropped into
200.0 g of water initially at 20.0

C. The final temperature of the mixture is 21.5

C. What is the specific heat of erbium metal?
3.
A 21.5 g block of titanium was placed in a Bunsen burner for 10 minutes and heated to some unknown temperature. The block was then placed into 100.0 ml of water at an initial temperature of 20.0

C. The final temperature of the mixture was 39.5

C.
How hot did the titanium block get? (C
Ti
= 0.523 J/ g

C)
4.
A block of rhenium metal (specific heat = 0.138 J/g

C) is heated to 88.2

C and then dropped into 100.0 g of water initially at 26.4

C. The final temperature of the mixture is 32.4

C. What was the mass of the block of rhenium?
5.
(Extra Credit) What is the final temperature of 250.0 g of water whose initial temperature is 25.0

C if 80.0 g of aluminum (initially at 70.0

C) is dropped into the water? The specific heat of aluminum is 0.900 J/g

C.
Answers: 1) 210. g 2) 0.171 J/g

C 3) 766

C 4) 326 g