# The experimental calculation of the specific heat of aluminum was found to be 156 cal/g °C, but the actual value was given as 185 cal/g°C. What is the percent error?

##### 1 Answer

Jan 27, 2018

#### Explanation:

This problem can be solve using the formula shown below.

#%"error"="absolute error"/"actual value"xx100#

#where:#

#"absolute error"="actual value"-"experimental value"#

#"absolute error"=(185cal)/(g*^oC)-(156cal)/(g*^oC)#

#"absolute error"=(29cal)/(g*^oC)#

Knowing the absolute error, % error can be calculated using the formula described above. Plug in the given and the calculated values as shown below.

#%"error"="absolute error"/"actual percentage"xx100#

#%"error"=(29cancel((cal)/(g*^oC)))/(185cancel((cal)/(g*^oC)))xx100#

#%"error"=0.16xx100#

#%"error"=16%#