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Revision notes on 4.2.2 Pressure for the CIE A Level Physics syllabus, written by the Physics experts at Save My Exams.
Pressure, p. Pressure is measured in pascals, Pa - sometimes expressed as newtons per square metre, N m -2. These mean exactly the same thing. Be careful if you are given pressures in kPa (kilopascals). For example, 150 kPa is 150000 Pa. You must make that conversion before you use the ideal gas equation.
A-level Physics data and formulae For use in exams from the June 2017 Series onwards Version 1.5 1. DATA - FUNDAMENTAL CONSTANTS AND VALUES. Quantity Symbol Value Units . speed of light in vacuo .
Students may have a copy of this Data Booklet for their personal use in lessons and for homework, to allow them to become familiar with how to use it. Physical constants. Avogadro constant (L) Elementary charge (e) Gas constant (R) Molar volume of a gas at room temperature and pressure (r.t.p.): Ionic product of water (KW)
Oxidation, Reduction and Redox Equations. Summary notes, flashcards, revision videos and past exam questions by topic for AQA Chemistry AS and A-Level Physical Chemistry I.
The ideal gas law can be written as: Pressure x volume = number of moles x ideal gas constant x temperature. pV=nRT. Where R is the ideal gas constant and has a value of 8.31. This equation can be rearranged to solve for any of the terms.
Revision for AQA Chemistry AS and A-Level from 2015, including summary notes, worksheets and past exam questions for each topic and paper.
