enthalpy
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7 Terms
what are the standard conditions
temperature = 25^C or 298K
pressure = 100kPa
concentration = 1moldm-3
standard enthalpy change = KJ per mol
all chemicals in standard states
what is standard enthalpy change of combustion?
the enthalpy change when one mole of a substance reacts completely with oxygen under standard states and standard conditions
what is standard enthalpy change of neutralisation?
the enthalpy change when one mole of water is formed in a neutralisation reaction between an acid and an alkali under standard conditions
what is the standard enthalpy change of formation?
the enthalpy change when one mole of a substance is formed from its constituent elements in their standard states
what is the standard enthalpy change of reaction?
the enthalpy change when a reaction takes place in the molar quantities shown by the balanced chemical equation under standard conditions
what is the average bond enthalpy?
the energy needed to break one mole of a specific bond in a molecule in its gaseous state
which ways do the arrows form in the enthalpy change of combustion?
upwards