0
What is the enthalpy change of neutralisation for strong acid with a strong base?
Wiki User
∙ 11y ago
The enthalpy of neutralization of a strong acid against a strong base is always constant (13.7 kcal or 57 kJ mole-1). It is because in dilute solutions all strong acids and bases ionize completely and thus the heat of neutralization in such cases is actually the heat of formation of water from H+ and OH- ions, i.e.,
H+ + OH- ---> H2O; ΔH = -13.7 kcal
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoThere is no connection between enthalpy of neutralisation and whether the acid is weak or strong. The enthalpy of the reaction depends on ALL reactions and changes that happen, not just the one involving the hydrogen ion.
Wiki User
∙ 15y agoBecause the value changes at a constant degree
Add your answer:
Earn +20 pts
Why is the enthalpy change of neutralisation equal to -57.2kJ mol-1?
Actually your question should sound "Why is the enthalpy change of neutralization of STRONG ACID and STRONG BASE equal to -57.2kJmol-1?". This is because when STRONG ACID and STRONG BASE react and neutralization process occur, a complete ionization will occur. Therefore, they will have almost the same value of enthalpies and can be assummed to be -57.2kJmol-1. As per mentioned that if your question sounds "Why is the enthalpy change of neutralization of STRONG ACID and STRONG BASE equal to -57.2kJmol-1?", then my explaination above will be helpful. However, if it doesn't sound like mine and you insisted with your question titled "Why is the enthalpy change of neutralization equal to -57.2kJmol-1", then my answer is that they didn't equal to -57.2kJmol-1 and it varies from the list of reactants. 1. STRONG acid + STRONG base = -57.2 2. WEAK acid + WEAK base = less than 57.3kJmol-1 3. WEAK acid + STRONG base = more negative than -57.3kJmol-1 Wish that it is useful as your reference. Prompt me if I am wrong.
What is the equation for a neutralisation reaction?
use the formula for enthalpy change for the reaction of an acid and base to produce 1mol of water. dH=mc(dT)/n where H = enthalpy m = mass of system c = specific heat capacity of system T = temperature of system n = number of moles reacted
How is the neutralisation reaction of ammonia and nitric acid different from most neutralisation reactions?
Because it doesnt have water
Is sodium hydroxide and hydrochloric acid a neutralisation reaction?
Yes, it is. Sodium hydroxide and hydrochloric acid are both strong base and strong acid. It means that they dissociate fully in water. In neutralisation reaction the products of the reaction are: water, and salt of the two compounds. NaOH + HCl -> NaCl + H2O No H3O+ and OH- ions are formed, therefore solution after the reaction is neutral. There is but one condition, the reactants must be mixed stoichiometrically.
In the neutralisation of sulfuric acid by potassium hydroxide what displaces the hydrogen in the acid?
ddrdg
Which equation do you use to calculate the enthalpy of neutralisation from an acid-base reaction?
yea
Why is the enthalpy change of neutralisation equal to -57.2kJ mol-1?
Actually your question should sound "Why is the enthalpy change of neutralization of STRONG ACID and STRONG BASE equal to -57.2kJmol-1?". This is because when STRONG ACID and STRONG BASE react and neutralization process occur, a complete ionization will occur. Therefore, they will have almost the same value of enthalpies and can be assummed to be -57.2kJmol-1. As per mentioned that if your question sounds "Why is the enthalpy change of neutralization of STRONG ACID and STRONG BASE equal to -57.2kJmol-1?", then my explaination above will be helpful. However, if it doesn't sound like mine and you insisted with your question titled "Why is the enthalpy change of neutralization equal to -57.2kJmol-1", then my answer is that they didn't equal to -57.2kJmol-1 and it varies from the list of reactants. 1. STRONG acid + STRONG base = -57.2 2. WEAK acid + WEAK base = less than 57.3kJmol-1 3. WEAK acid + STRONG base = more negative than -57.3kJmol-1 Wish that it is useful as your reference. Prompt me if I am wrong.
What is the reaction when you add acids and alkali's?
you create a neutral solution -------------------------------------------------------------------------------------------- Well it depends actually it doesn't always create a neutral solution. Here's the order: Strong Alkali + Strong Acid = Neutralisation (water + salt) Strong Alkali + Weak Acid = Weak Alkali Weak Alkali + Weak Acid = Neutralisation ( water + salt) Weak Alkali + Strong Acid = Weak Acid Strong Alkali + Strong Acid = Neutralisation (water + salt) Hope it helps! :)
What do you find out about the pH changes that take place when neutralisation occurs between a strong acid and a strong base?
pH7,Which It Water.
Is salt an acid?
It depends you can sometimes get an alkaline salt.if you use a strong acid and a weak base during neutralisation you will get an acidic salt (eg. Ammonia chloride. Made from hydrochloric acid and ammonia) However, if you use a weak acid and a strong base during neutralisation you will get an alkaline salt (eg. Sodium ethanoate. Made from sodium hydroxide and ethanoic acid)
What is the equation for a neutralisation reaction?
use the formula for enthalpy change for the reaction of an acid and base to produce 1mol of water. dH=mc(dT)/n where H = enthalpy m = mass of system c = specific heat capacity of system T = temperature of system n = number of moles reacted
What is the enthalpy change of solution of oxalic acid?
Enthalpy of solution of oxalic, succinic, adipic, maleic, malic, tartaric, and citric acids, oxalic acid dihydrate, and citric acid monohydrate in water at 298.15 K
Is it always a case that a neutralisation of an acid by a base gives a neutral salt?
no if the acid is strong and the base is weak then the salt will be slightly acidic. sources: chemistry teacher :)
How is neutralisation used to treat indegestion?
Stomach acid is hydrocloric acid. This has a pH scale of 1. This is tackled by a strong alkali to make the pH 7. aka neutral
Does the temperature change when an acid reacts with an alkali?
Yes. An acid-base neutralisation is exothermic, so energy will be released and part of this energy will heat the mixture.
What is the reaction called Between a Acid And Alkalie?
neutralisation.... i..think.................
What is the neutralisation?
acid + base --> water + salt
