# Heat Capacity and Specific Heat Worksheet #1 3/3/04 1:26:41 PM

Name:
Date:
Period:
Ch 11 Worksheet 1 - Heat Capacity and Specific Heat
May 6, 2008
Remember: 1 calorie = 4.184 joules 1000 joules = 1 kJ
1000 calories = 1 kcal
1. Make the following conversions:
a. 8.5 x 102 cal to kcal
b. 444 cal to J
c. 1.8 kJ to J
d. 4.5 x 10-1 kJ to cal
Remember: Heat capacity = joules / &ordm;C for an object
(J/ &ordm;C)
Specific heat capacity = joules / &ordm;C per gram of substance (J / g &ordm;C)
2. The heat capacity of a 78.0 g chunk of a certain type of glass is 41.3 J/&ordm;C. What is the
specific heat capacity of this glass?
3. How many kilojoules of energy are in a doughnut that contains 200.0 kcal?
Remember: Δq = m c ΔT
4. What is the specific heat of a substance that has a mass of 25.0 g and requires 525.0 calories
to raise its temperature by 15.0 &ordm;C?
5. Suppose 100.0 g of H2O(s) absorbs 1255.0 J of heat. What is the corresponding temperature
change?
6. How many joules of heat energy are required to raise the temperature of 100.0g of aluminum
by 120.0 &ordm;C?
7. How much energy must be absorbed by 20.0 g of water to increase its temperature from 53.0
&deg;C to 83.0 &deg;C?
8. When 15.0 g of steam drops in temperature from 275.0 &deg;C to 250.0 &deg;C, how much heat
energy is released? c(steam) = 1.70 J/gC
9. If 720.0 g of steam at 400.0 &deg;C absorbs 800.0 kJ of heat energy, what will be its increase in
temperature?
10. How much heat (in kJ) is given out when 85.0 g of lead cools from 200.0 &deg;C to 10.0 &deg;C? (Cp
of lead = 0.129 J/g &deg;C)
11. If it takes 41.72 joules to heat a piece of gold weighing 18.69 g from 10.0 &deg;C to 27.0 &deg;C,
what is the specific heat of the gold?
12. A certain mass of water was heated with 41,840 Joules, raising its temperature from 22.0 &deg;C
to 28.5 &deg;C. Find the mass of water.