The stability of the following alkali metal chlorides follows the order

Question

The stability of the following alkali metal chlorides follows the order (A)  LiCl>KCl>NaCl>CsCl  (B)  CsCl>KCl>NaCl>LiCl  (C)  NaCl>KCl>LiCl>CsCl  (D)  KCl>CsCl>NaCl>LiCl

Tardigrade Admin · Accepted Answer

Stability of a compound depends upon its enthalpy of formation

Δ h_{f} .

The more negative value of

Δ H_{f}

shows more stability of a compound. Thus, KCI is more stable and

LiCl

is least stable.

Δ H_{f}

for

L i Cl = - 408.8 k J m o l^{- 1}

Δ H_{f}

for

N a Cl = - 412.5 k J m o l^{- 1}

Δ H_{f}

for

C s Cl = - 433 k J m o l^{- 1}

Δ H_{f}

for

K Cl = - 436 k J m o l^{- 1}

Q. The stability of the following alkali metal chlorides follows the order

$L i Cl > K Cl > N a Cl > C s Cl$

$C s Cl > K Cl > N a Cl > L i Cl$

$N a Cl > K Cl > L i Cl > C s Cl$

$K Cl > C s Cl > N a Cl > L i Cl$