Is the amount of heat energy taken in or given out in a system given that the pressure is constant
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True or false in exothermic reactions products have more energy than the reactants
False it is less
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True or false in endothermic reactions products have more energy than there reactants
True the value of an endothermic reaction is positive
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What is the standard enthalpy change of formation
It is the enthalpy change when 1 mole of of the compound is formed from its elements under standard conditions and all reactants and products being in their standard states
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What is the enthalpy change of combustion
It is the enthalpy change when 1 mole of compound is combusted in oxygen under standard conditions and all elements being in their standard states
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what is the equation for enthalpy change
q=m x c x t
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What is Hess' law
enthalpy change for a reaction is independent by which route it takes meaning energy is always conserved
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How do you determine the enthalpy change of formation
reaction= products - reactants
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How do you determine the enthalpy change of combustion
reaction= reactants - products
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Mean bond enthalpies
Enthalpy needed to break covalent bonds into gaseous atoms arranged into different molecules
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in a homologous series why does the enthalpies of combustion increase in alkanes
because of the increase in the length in carbon atoms
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Other cards in this set
Card 2
Front
True or false in exothermic reactions products have more energy than the reactants
Back
False it is less
Card 3
Front
True or false in endothermic reactions products have more energy than there reactants
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