Is Chemguide a level?
A level subject content building on the AS content (Although many of the titles are the same, the content is an addition to the AS content.)
What is Chemguide?
Chemguide. written by Jim Clark. This informational website was developed by a veteran high school teacher to promote deeper understanding of concepts in introductory and intermediate-level chemistry.
What is organic chemistry Chemguide?
Basic Organic Chemistry. Includes help on bonding, naming and isomerism, and a discussion of organic acids and bases. Properties of organic compounds. Covers the physical and chemical properties of compounds on UK A level chemistry syllabuses, and includes a limited amount of biochemistry. Organic Reaction Mechanisms.
What is enthalpy Chemguide?
Enthalpy change is the name given to the amount of heat evolved or absorbed in a reaction carried out at constant pressure.
What is benzene Chemguide?
Benzene, C6H6, is a planar molecule containing a ring of six carbon atoms each with a hydrogen atom attached. The six carbon atoms form a perfectly regular hexagon. All the carbon-carbon bonds have exactly the same lengths – somewhere between single and double bonds.
What is equilibrium Chemguide?
A dynamic equilibrium occurs when you have a reversible reaction in a closed system. At equilibrium, the quantities of everything present in the mixture remain constant, although the reactions are still continuing. This is because the rates of the forward and the back reactions are equal.
What is entropy Chemguide?
Entropy changes in reactions involving at least some gas molecules. Gases have higher entropies than solids or liquids because of their disordered movement. That means that during a reaction in which there is a change in the number of molecules of gas present, entropy will change.
What does Hess law state?
Hess’s law, also called Hess’s law of constant heat summation or Hess’s law of heat summation, rule first enunciated by Germain Henri Hess, a Swiss-born Russian chemist, in 1840, stating that the heat absorbed or evolved (or the change in enthalpy) in any chemical reaction is a fixed quantity and is independent of the …
What is phenol Chemguide?
INTRODUCING PHENOL Phenol is the simplest member of a family of compounds in which an -OH group is attached directly to a benzene ring. Phenol itself is the only one of the family that you are likely to need to know about for UK A level purposes.
What is the difference between arenes and aromatic compounds?
Almost, arenes are aromatic hydrocarbons, compounds that typically contain benzene rings. To be a little more precise, aromatic compounds are conjugated planar ring structures, and can include compounds such as pyridine which have five carbons and a nitrogen in the ring.