For the reaction: H2(g)+Cl2(g) → 2HCl; Δ H = -44 kcal What is the enthalpy of decomposition of HCl ?

Question

For the reaction: H2(g)+Cl2(g) → 2HCl; Δ H = -44 kcal What is the enthalpy of decomposition of HCl ? (A) + 44 kcal/mol (B) - 44 kcal/mol (C) - 22 kcal/mol (D) +22 kcal/mol

Tardigrade Admin · Accepted Answer

Enthalpy of decomposition of HCl will be (44/2) = 22 kcal/mol

Q. For the reaction : $H_{2 (g)} + C l_{2 (g)} \to 2 H Cl$ ;
$Δ H = - 44 k c a l$
What is the enthalpy of decomposition of $H Cl$ ?

$+ 44 k c a l / m o l$

$- 44 k c a l / m o l$

$- 22 k c a l / m o l$

$+ 22 k c a l / m o l$

Enthalpy of decomposition of $H Cl$ will be $\frac{44}{2} = 22 k c a l / m o l$

Q. For the reaction : H2(g)​+Cl2(g)​→2HCl; ΔH=−44kcal What is the enthalpy of decomposition of HCl ?

+44kcal/mol

−44kcal/mol

−22kcal/mol

+22kcal/mol