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?

Md Ariful Islam

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Md Ariful Islam

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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.

$%"error"="absolute error"/"actual percentage"xx100$
$%"error"=(29cancel((cal)/(g*^oC)))/(185cancel((cal)/(g*^oC)))xx100$
$%"error"=0.16xx100$
$%"error"=16%$

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