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Chemistry
A Level

How do I calculate the Gibbs free energy change for a reaction when given the entropy change, enthalpy change and the reaction conditions>

deltaG= Gibbs free energy 

deltaG=deltaH - TdeltaS 

If deltaH= 150 kJ/mol and deltaS=2.1 J/mol we must first convert the deltaS into kJ/mol, this is done by multiplying by 1...

Answered by Archit M. Chemistry tutor
9259 Views

How do I predict the shape and bond angle of an molecule?

Electron pairs arrange themselves so they are as far apart as possible (electron pair repulsion theory). In a covalent compound, the number of electron pairs around the central atom determines the shap...

Answered by Tolu T. Chemistry tutor
13946 Views

What is Gibbs free energy? How is it useful?

The Gibbs free energy of a process is a measure of how readily that process will proceed on its own - a negative value means that the reaction is spontaneous, a positive value means that it is not, and...

Answered by Murdo M. Chemistry tutor
8336 Views

What is Mass Spectrometry?

Mass spectrometry is a technique we use to analyse and determine the structure of compound. Generally, it works by injecting your compound into an ionisation chamber, ...

Answered by Sinead B. Chemistry tutor
3133 Views

Define the "standard enthalpy change of atomisation".

This is a standard definition question that is relatively common in A level papers.

 

48743 Views

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