3/21/15, 7:42 PM
Chapters 3 and 4
An unknown substance has a mass of 12.9
. When the substance absorbs 1.161
of heat, the temperature of the substance is raised from 25.0
. What is the most likely identity of the substance?
How to approach the problem
In this case, the substance can be identified by its specific heat capacity. The specific heat capacity can be determined using the following equation:
is the heat,
is the mass,
is the specific heat capacity, and
is the change in temperature. Once you have determined the specific
heat capacity of the substance, compare the value to the data given in the chart in the introduction.
Calculate the temperature change
What is the temperature change,
Express your answer with the appropriate units.
Determine the meaning of
What does the variable
Page 7 of 24
Solve the equation for the specific heat capacity
Rearrange this equation to isolate the specific heat capacity,
Calculate the specific heat capacity
Given that the equation that relates heat and temperature can be rearranged to solve for specific heat capacity,