Search our library of Chemistry questions

Top answers

Chemistry

All levels

Briefly discuss Le Chatelier's Principle. Ammonia is made in the Haber Process (3H2(g) + N2(g)<-> 2NH3(g)). Using Le Chetelier's Principal, what happens to the equilibrium yield of ammonia when...: A) Temp increases, B) Press increases C) Catalyst changes

Le Chetelier's Principal gives us a guide to work out what will happen when we change the conditons of a reaction in dynamic equilibrium. It states that if the dynamic equilibiurm is disturbed, the equili...

Answered by James C. • Chemistry tutor

12844 Views

Explain why an atom has no overall charge.

An atom is comprised of protons, neutrons, and electrons. Protons have positive charge and the number of protons is dictated by the proton number, which is the same as the number of electrons, which have ...

Answered by James C. • Chemistry tutor

20567 Views

Write down the equation for the Gibbs Free Energy change of a reaction. Hence explain why, for a spontaneous endothermic reaction, there must be an increase in the total entropy.

Gibbs Free Energy change: (delta)G = (delta)H - T(delta)S For a spontaneous chemical reaction, (delta)G must be negative. An endothermic reaction has a positive (delta)H value therefore, in order for the ...

Answered by James C. • Chemistry tutor

3912 Views

What does reversible mean?

Reversible is a term used for certain reactions that never reach a final stage. So imagine we have A and B reacting together to form C, and we say that this reaction is reversible. So at a point in time, ...

Answered by Antonis T. • Chemistry tutor

2971 Views

What is the rate of a reaction and how can you determine it experimentally?

The rate of a reaction is the rate at which reagents are used up and product are formed. Reaction rates depend on concentration. A typical rate law is rate=k*[A]^m*[B]ⁿ. To find the v...

Answered by Antonia C. • Chemistry tutor

2571 Views