How to calculate the enthelpy change of a neutralization reaction

  • Thread starter Thread starter stargazer
  • Start date Start date
  • Tags Tags
    Change Reaction
AI Thread Summary
To calculate the enthalpy change of a neutralization reaction, such as between NaOH and HCl, the formula used is delta H = [products] - [reactants]. The enthalpy of neutralization for a strong acid and strong base is typically around -13.7 Kcal. However, calculations can vary based on data sources, with one example yielding -43 Kcal/mol. Accurate calculations require knowledge of the enthalpy of formation for each compound involved. Starting from standard elements in their most stable state is essential for precise results.
stargazer
Messages
1
Reaction score
0
Chemistry Help-Enthalpy

Hi. I would very much like to know how to calculate the enthalpy change of a neutralization reaction, for example, NaOH(aq) and HCl(aq).
Thank you very much.
 
Last edited:
Physics news on Phys.org
stargazer said:
Hi. I would very much like to know how to calculate the enthalpy change of a neutralization reaction, for example, NaOH(aq) and HCl(aq).
Thank you very much.

Strong acid + strong base has an enthalpy of neutrailzation = -13.7 Kcal

which is the case here
 
Last edited by a moderator:
Start from the standard elements in their most stable state at standard conditions. Unless the enthalpy of formation for each compound is provided to you already, it can be a bit complex. Here is an example...

http://groups.msn.com/GeneralChemistryHomework/general.msnw?action=get_message&mview=0&ID_Message=116&LastModified=4675466454162512526
 
Last edited by a moderator:
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Struggle to understand the concept of the question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Chemistry How to determine whether a single reaction is better than multi-stage reaction?
Replies
2
Views
2K
Chemistry How Do I Find the Molar Enthalpy Change for Reactions 2 and 3?
Replies
10
Views
3K
Chemistry Where Did the 400g in Enthalpy Change of Neutralization Come From?
Replies
3
Views
2K
Finding the reqiured fuel mass for a nuclear reaction
Replies
1
Views
960
Chemistry How to take into account autoprotolysis in weak base solution?
Replies
8
Views
2K
Chemistry Understanding Heat of Neutralization in Acid-Base Reactions
Replies
9
Views
3K
Reaction enthelpy at non-standard conditions
Replies
2
Views
11K
Chemistry Does Combusting Different Amounts of Propane Change Final Temperature?
Replies
5
Views
2K
Thermodynamics-when should I use u & h ?
Replies
6
Views
10K
Chemistry Question about balancing a reaction
Replies
5
Views
2K

Hot Threads

Recent Insights

Back
Top