finding the percentage error for ammonium chloride

Question

1. molar enthalpy is -4219.568796
2. q is -280.7788
3. theoretical value for ΔH is 15.2 kJ/mol

Answer 1

Percent error = [(|theoretical value - experimental value|) / theoretical value] x 100

Note: use absolute value

Using the values provided:

% error = [|15.2 - (-4219.6)| / 15.2] x 100

% error = [4235.8/15.2] x 100

%error = 277.9%