EEE unit for chemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| State the definition of lattice enthalpy. | The energy required to from one mole of ionic compound from its gaseous ions under standard conditions.
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| State the definition of the first electron affinity. | The energy required accompanying the addition of one electron to each atom in one mole of gaseous atoms to form one mole of gaseous 1- ions.
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| State the enthalpy change of atomisation. | The energy required to form one mole of gaseous atoms from the element in its standard state.
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| What does Hess's law state? | If a reaction van take place by more than one route and the initial and final conditions art the same, the total enthalpy change is the same for each route.
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| State the equation to calculate the ionic product of water. | KC = [H+][OH-]
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| What is value of the enthalpy change for an endothermic reaction? | +ve
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| What is the value of the enthalpy change for an exothermic reaction? | -ve
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