Download balanced equation for the reaction.

Name: ____________________________________________________ Period: __________ Date: ___________________
1. The temperature of an 9.0 g sample of metal changed from 25°C to 30°C when it absorbed
414 J of heat. What is the specific heat of this sample?
2. Determine the specific heat of a material if an 65 g sample absorbed 70 J as it was heated
from 22°C to 37°C.
3. What is the specific heat of a substance if 143 cal are required to
raise the temperature of a 321-g sample by 18 C?
4. What is the amount of heat required to raise the temperature of
541 g of aluminum by 13 C?
(specific heat of aluminum = 0.21 cal/gC)
oC,
m is measured in grams (g), and q is measured in Joules (J),
what are the units for specific heat capacity?
6.) What is the temperature change of a 120 g piece of aluminum whose specific heat is
1.89 J/goC after 1800 J of heat energy is applied?
7.) A beaker containing 250.0 g of water is heated with 1500.0 J of heat energy. If the
temperature of the water changed from 22.0000oC to 23.4354oC, what is the specific heat of
water?
8.) Heat energy equal to 25,000 J is applied to a 1200 g brick whose specific heat is 2.45
J/goC.
a) What is the change in temperature of the brick?
b) If the brick was initially at a temperature of 25.0oC, what is the final
temperature of the brick?
9.) The temperature of an 16.0 g sample of metal changed from 20°C to 50°C when it
absorbed 900 J of heat. What is the specific heat of this sample?
10.) If 50.0 mL of water containing HCl is mixed with 60.0 mL of water containing NaOH in
a calorimeter such that the initial temperature of each solution was 24.0°C and the final
temperature of the mixture is 33.0°C, how much heat (in kJ) is released in the reaction?
Assume that the densities of the solutions are 1.00 g/mL.
11.) Determine the specific heat of a material if an 30 g sample absorbed 125 J as it was
heated from 15°C to 40°C.
12.) What is the specific heat of a substance if 3500. cal are required to raise the
temperature of a 300.-g sample by 10. C?
13.) What is the heat of reaction (H) for the combustion (with O2) of
benzene, C6H6 to form carbon dioxide and water? Write the
balanced equation for the reaction.
Standard heats of formation:
C6H6 = +48.50 kJ
O2 = 0.0 kJ
CO2 = -393.5 kJ
H20 = -285.8 kJ