Magnesium Reacting With Acids, molar enthelpy

Thread starter xodreamxo
Start date Mar 29, 2015
Tags

Acids Magnesium

AI Thread Summary

The reactions of magnesium with hydrochloric acid, sulfuric acid, and acetic acid all produce hydrogen gas and heat. The molar enthalpy of these reactions varies based on the strength of the acid and the resulting products. Stronger acids like HCl and H2SO4 typically yield higher molar enthalpy compared to weaker acids like acetic acid. The enthalpy change is influenced by the bond energies of the reactants and the stability of the products formed. Overall, the reaction with sulfuric acid is expected to produce the greatest molar enthalpy, while the reaction with acetic acid will produce the least.

Mar 29, 2015

xodreamxo

You have to show your attempts at answering the question, this is a forum policy.

Mg(s) + 2HCl (aq) --> H2(g) + MgCl2(aq) + heatMg (s) + H2SO4(aq) --> H2 (g) + MgSO4 (aq) + heatMg(s) + 2C2H4O2(aq) --> H2 (g) + Mg(C2H3O2)2 (aq) + heat

Which reaction will produce the great molar enthalpy and which the least? Why?

Physics news on Phys.org

Mar 29, 2015

Matternot

Gold Member

What do you think determines the molar enthalpy?

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...

View full post »

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...

View full post »