Identify the correct order of standard enthal | vedclass

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(B) The standard enthalpy of formation $(\Delta_{f}H^0)$ for ionic compounds like sodium halides is primarily determined by the lattice energy and the

Vedclass · Accepted Answer

$NaF < NaCl < NaBr < NaI$

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(B) The standard enthalpy of formation $(\Delta_{f}H^0)$ for ionic compounds like sodium halides is primarily determined by the lattice energy and the hydration/sublimation energies. As the size of the halide ion increases from $F^-$ to $I^-$,the lattice energy decreases (becomes less negative). Consequently,the overall enthalpy of formation becomes less negative (i.e.,increases algebraically) in the order $NaF Therefore,the correct order of $\Delta_{f}H^0$ values is $NaF < NaCl < NaBr < NaI$.

Identify the correct order of standard enthalpy of formation of sodium halides.

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