What is the enthalpy change of HCl and NaOH?
Christopher Pierce
Updated on February 26, 2026
Enthalpy of Neutralization: Strong Diprotic Acid and Strong Monobasic Base
| HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) | ΔHneut = -55.2 kJ mol-1 (of water) |
|---|---|
| H2SO4(aq) + 2NaOH(aq) → Na2SO4(aq) + 2H2O(l) | ΔHneut = -55.8 kJ mol-1 (of water) |
How do you calculate the enthalpy change of HCl and NaOH?
Calculate the number of moles of base you add to determine the molar heat of neutralization, expressed using the equation ΔH = Q ÷ n, where “n” is the number of moles. For example, suppose you add 25 mL of 1.0 M NaOH to your HCl to produce a heat of neutralization of 447.78 Joules.
What happens when solid sodium hydroxide reacts with hydrochloric acid?
Hydrochloric acid and sodium hydroxide interact, resulting in salt and a release of heat.
Is NaOH and HCl endothermic or exothermic?
The reaction of HCl(aq), a strong acid, with NaOH(aq), a strong base, is an exothermic reaction.
What is the enthalpy of HCl?
−92.3 kJ/mol.
The standard enthalpy of formation of HCl(g) is −92.3 kJ/mol.
What happens when NaOH and HCl are mixed in equal molar quantities?
When equal volumes of hydrochloric acid (strong acid) and sodium hydroxide (strong base) solution of same concentration are mixed, the result is salt and water. This is a neutralisation reaction.
Does HCl and NaOH form a precipitate?
For example, the neutralization reaction between hydrochloric acid HCl and sodium hydroxide NaOH counts as a double displacement reaction. However, this reaction produces no precipitate.
How do you calculate the enthalpy of HCl?
- H X 2 ( g ) + Cl X 2 ( g ) ⟶ 2 HCl X ( g )
- ∴ H X 2 ( g ) + Cl X 2 ( g ) ⟶ 2 HCl X ( g ) , ∆rH° = −186 kJ.
- 1 2 H X 2 ( g ) + 1 2 Cl X 2 ( g ) ⟶ HCl X ( g )
What is the delta H of NaOH HCl?
-57.9 kJ mol-1
For example, one source which gives the enthalpy change of neutralisation of sodium hydroxide solution with HCl as -57.9 kJ mol-1, gives a value of -56.1 kJ mol-1 for sodium hydroxide solution being neutralised by ethanoic acid.
What is the reaction between HCl and NaOH?
The reaction in which hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH) to produce water (H2O) and sodium chloride (NaCl) is a special type of double displacement reaction called a neutralization reaction. In a double displacement reaction,…
What happens when you mix NaOH and HCl?
When HCL and NaOH are mixed together then HCL dissociates into H+ ion and Cl- ion and NaOH dissociates into NA+ and OH-. so respective ions combine together to form NaCl and H20.
How to balance HCl+ NaOH?
To balance NaOH + HCl = NaCl + H2O you’ll need to be sure to count all of atoms on each side of the chemical equation. Once you know how many of each type
What is the oxidation state of NaOH?
Oxidation State is basically formal charge on on atom. Na being in 1st group, it’ll hold +1 charge. Oxygen being bonded to non-metal (Hydrogen) it’ll hold – 2 charge. Now total total charge on NaOH is zero, so sum of oxidation state will be zero.
