What is the heat of solution of sodium chloride from following data? Hydration energy of Na+ = - 389.4 kJ mol-1 Hydration energy of Cl- = - 382.3 kJ mol-1 Lattice energy of NaCl = - 776 kJ mol-1

Question

What is the heat of solution of sodium chloride from following data? Hydration energy of Na+ = - 389.4 kJ mol-1 Hydration energy of Cl- = - 382.3 kJ mol-1 Lattice energy of NaCl = - 776 kJ mol-1 (A) + 8.6 kJ mol-1 (B) + 4.3 kJ mol-1 (C) - 4.3 kJ mol-1 (D) - 8.6 kJ mol-1

Tardigrade Admin · Accepted Answer

Hydration energy of NaCl = - 389.4 - 382.3 = -771.7 kJ mol-1 ΔHsol. = Hydration energy - Lattice energy = - 771.7 - (-776) = + 4.3 kJ mol-1

Q. What is the heat of solution of sodium chloride from following data?
Hydration energy of $N a^{+} = - 389.4 k J m o l^{- 1}$
Hydration energy of $C l^{-} = - 382.3 k J m o l^{- 1}$
Lattice energy of $N a Cl = - 776 k J m o l^{- 1}$

$+ 8.6 k J m o l^{- 1}$

$+ 4.3 k J m o l^{- 1}$

$- 4.3 k J m o l^{- 1}$

$- 8.6 k J m o l^{- 1}$

Hydration energy of $N a Cl = - 389.4 - 382.3$
$= - 771.7 k J m o l^{- 1}$
$Δ H_{so l} . =$ Hydration energy - Lattice energy
$= - 771.7 - (- 776) = + 4.3 k J m o l^{- 1}$

Q. What is the heat of solution of sodium chloride from following data? Hydration energy of Na+=−389.4kJmol−1 Hydration energy of Cl−=−382.3kJmol−1 Lattice energy of NaCl=−776kJmol−1

+8.6kJmol−1

+4.3kJmol−1

−4.3kJmol−1

−8.6kJmol−1