# Enthelpy change of a neutralisation reaction

• IDK10
So you better start with what you know, the reaction equation.What is the physical meaning of ΔH for this type of reaction?
IDK10

## Homework Statement

Given the reaction K2CO3(s) + 2HCl(aq) → 2KCl(aq) + CO2(g) + H2O(l), I need to find the enthalpy change in J, given that:
The specific heat capacity of water is 4.2J g-1 °C-1, and
The mass change of potassium carbonate is 2.98g, and the temperature change was °6C, and the volume of acid used was 30cm3.

## Homework Equations

ΔH = -qmΔT
number of moles of acid neutralised = number of moles of water formed

## The Attempt at a Solution

Considering it is a neutralisation reaction, I did the ΔH = -qmΔT equation. So, -4.2x-2xm=x
x/(2x0.03)
But what do I use for m?

What undergoes a temperature change of 6°C?

mjc123 said:
What undergoes a temperature change of 6°C?
Exothermic

We only do neutralisation, combustion and formation enthalpy changes.

IDK10 said:
Exothermic

We only do neutralisation, combustion and formation enthalpy changes.

I am afraid you have not understood nor answered the mjc's question, which points you in the right direction.

You can't blindly apply any formula without knowing what it describes.

## 1. What is enthalpy change of a neutralisation reaction?

The enthalpy change of a neutralisation reaction is the difference in enthalpy (heat energy) between the reactants and products of a neutralisation reaction. It is a measure of the amount of heat energy released or absorbed during the reaction.

## 2. How is enthalpy change of a neutralisation reaction calculated?

The enthalpy change of a neutralisation reaction can be calculated using the formula: ΔH = ΔHproducts - ΔHreactants. This involves subtracting the enthalpy of the reactants from the enthalpy of the products.

## 3. What factors can affect the enthalpy change of a neutralisation reaction?

The enthalpy change of a neutralisation reaction can be affected by factors such as temperature, pressure, and the concentrations of the reactants and products. It can also be influenced by any catalysts or inhibitors present.

## 4. How does the enthalpy change of a neutralisation reaction relate to the strength of the acid and base?

The enthalpy change of a neutralisation reaction is directly related to the strength of the acid and base involved. Stronger acids and bases will have a more exothermic (heat-releasing) neutralisation reaction, while weaker acids and bases will have a less exothermic reaction.

## 5. What are some real-life applications of enthalpy change of a neutralisation reactions?

The enthalpy change of neutralisation reactions has many practical applications, such as in the production of medicines and fertilisers, as well as in the food industry for processes such as fermentation and baking. It is also important in understanding and controlling the pH levels in our bodies and in the environment.

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