Question

If the theoretical value for AH of the reaction HCl + NH 3 NH 4 Cl is -51.669 kJ/mol, but from your experiment, you calculated the AH of the reaction to be -43.1 /mol, what is your percent error?

Answer 1

Answer: The percentage error is 16.6 %.

Explanation:

To calculate the percentage error, we use the equation:

$\%\text{ error}=\frac{|\text{Experimental value - Accepted value}|}{\text{Accepted value}}\times 100$

We are given:

Experimental value of ΔH = -43.1 kJ/mol

Accepted value of ΔH = -51.669 kJ/mol

Putting values in above equation, we get:

$\%\text{ error}=\frac{|(-43.1)-(-51.669)|}{(51.669)}\times 100\\\\\%\text{ error}=16.6\%$

Hence, the percentage error is 16.6 %.