Physical Chemistry Cards – Flashcards

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Energy cannot be created or destroyed
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First law of thermodynamics
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A reaction that gives out energy to its surroundings
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Exothermic reaction
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A reaction that takes in energy from its surroundings
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Endothermic reaction
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A mathematical expression incorporating the equilibrium concentrations of each substance present
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Equilibrium constant
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The total entropy of an isolated system can never decrease over time
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Second law of thermodynamics
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The change of enthalpy in a chemical reaction is independent of the pathway between the initial and final states
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Hess' law
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When a system in dynamic equilibrium is subjected to a change the position of equilibrium will shift to minimise the change
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Le Chatelier's principle
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