Advertisements
Advertisements
प्रश्न
Enthalpy of neutralization is always a constant when a strong acid is neutralized by a strong base: account for the statement.
Advertisements
उत्तर
- Enthalpy of neutralization of a strong acid by a strong base is always a constant and it is equal to − 57.32 kJ irrespective of which acid or base is used.
- Because strong acid or strong base means it is completely ionized in solution state. For e.g., NaOH (strong base) is neutralized by HCl (strong acid), due to their complete ionization, the net reaction takes place in only water formation.
So the enthalpy of neutralization is always constant for strong acid by a strong base.
\[\ce{H^+Cl^- + Na^+OH^- -> Na^+Cl^- + H2O}\]
\[\ce{H^+NO3^+ + K^+OH^- -> K^+NO3^+ + H2O}\]
(Net reaction) \[\ce{H^+ + OH^- -> H2O}\]
∆H = − 57.32 kJ
APPEARS IN
संबंधित प्रश्न
Write the expression showing the relation between enthalpy change and internal energy change for gaseous phase reaction.
What is standard N ≡ N bond enthalpy from following reaction,
\[\ce{N2_{(g)} + 3H2_{(g)} -> 2NH3_{(g)}; \Delta H^0 = - 83 kJ}\]
\[\ce{ΔH^0_{(H-H)}}\] = 435 kJ; \[\ce{ΔH^0_{(N-H)}}\] = 389 kJ
For which of the following ∆U = ∆H?
When 6.0 g of O2 reacts with CIF as per \[\ce{2ClF_{(g)} + O2_{(g)} -> Cl2O_{(g)} + OF2_{(g)}}\] the enthalpy change is 38.55 kJ. The standard enthalpy of the reaction is ____________.
In which of the following reactions does the heat change represent the heat of formation of water?
If 2 kJ of heat is released from system and 6 kJ of work is done on the system, what is enthalpy change of system?
The work done during combustion of 9 × 10-2 kg of ethane, C2H6 (g) at 300 K is ______.
(Given R = 8.314 J deg-1, atomic mass C = 12, H = 1)
Under what conditions ΔH = ΔU?
Calculate ΔS of the surrounding if the standard enthalpy of formation of methanol is − 238.9 kJ mol−1.
In a particular reaction, 2 kJ of heat is released by the system and 8 kJ of work is done on the system. Determine ΔU.
