Unit 2 definitions quiz A test on definitions for unit 2 of Chemistry as 3.5 / 5 based on 10 ratings ? ChemistryASOCR Created by: LucyCreated on: 04-06-10 12:06 Whats is a catalyst? increases the rate of reaction without being consumed by the overall reaction 1 of 6 What is a Pi bond? A bond formed above and below the plane of an atom by the sideways overlap of the p-orbitals 2 of 6 Whats is enthalpy? the heat content that is stored in a chemical system 3 of 6 What is homolytic fission? The breaking of a covalent bond with one of the bonded electrons going to each atom forming two radicals 4 of 6 Define molecular formula The actual number of atoms of each element in a molecule 5 of 6 Sate le Chatelier's principle When a system in dynamic equilibrium is subjected to a change, the position of equilibrium will shift to minimise the change. 6 of 6
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