1.

What is the enthalpy of neutralisation of HFagainst a strong base ?H (aq) + OH (aq.) → H2O(l);; Δ r H = −56 kJ/molΔ f H(HF,aq) = −329 kJ/mol;Δ f H(H2O(l)) = −285 kJ/mol;Δ f H(F ,aq.) = −320 kJ/mol(1) –17 kJ/mol (2) –38 kJ/mol(3) –47 kJ/mol (4) –43 kJ/mol

Answer» What is the enthalpy of neutralisation of HF
against a strong base ?
H (aq) + OH (aq.) → H2O(l);; Δ r H = −56 kJ/mol

Δ f H(HF,aq) = −329 kJ/mol;
Δ f H(H2O(l)) = −285 kJ/mol;
Δ f H(F ,aq.) = −320 kJ/mol

(1) –17 kJ/mol (2) –38 kJ/mol
(3) –47 kJ/mol (4) –43 kJ/mol


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