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LC Chemistry

Organic Chemistry – Fuels & Heats of Reaction

Organic chemistry is the chemistry of carbon containing compounds.

A hydrocarbon is a substance that contains only carbon and hydrogen.

There are three main hydrocarbons on the course – alkanes, alkenes and alkynes.

A homologous series is a series of compounds:

  • of similar chemical type.
  • that show gradual change in their physical properties.
  • all are prepared in a similar way.
  • have a common general formula
  • differ one from the next by a
  • group.

The Alkanes

The first homologous series we deal with is calles the alkanes (The ending tells us the chemical family).

Structural Isomers

Structural isomers... (More)

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LC English

Leaving Cert. English, Paper 1 – Part A: The Complete Guide

What are you being asked to do?

The marker is told to view each question as a task, which you must solve with your answer. Here the task is to show your comprehending skills; you are proving to the marker that you can read or look at a certain text and answer questions based on what you have read or seen. There are three question types used to test this: questions concerning what a written question is about, questions on the style of a written text, and questions on the style of a visual text.

If we look at the... (More)

From looking at the past papers about 90% of the marks for Biology can be gained from knowledge of all the definitions and theory. Most questions are not direct definitions but theory questions like "describe the..." and "draw the...". Direct definitions are about 20% of the paper. As the paper is mostly theory based, calculations are quite rare unlike chemistry and physics.

For chemistry on the other hand the marks are more mixed up. I would say about 55 - 60% can be gained from definitions and theory while the rest come from calculations. The first few lab experiment and... (More)