Question

If ΔH is -29.3 J and the H_Products is 125.9 J, what is the H_Reactants? Show your work.

Answer 1

Ans:-

We have

$ΔH=-29.3 \ J \ \ \ \ H_{products}=125.9\ J \ \ \ \ \ H_{Reactants}=?$

According to the Hess's Law

$\ \ \ \ \ ΔH= H_{Products}-H_{Reactants}\\$

$\ \ \ \ -29.3=125.9-H_{Reactants}\\$

$\ \ \ \ \ \ \ H_{Reactants}=155.2\ J$