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| Question | Answer |
| What is Enthalpy change of FORMATION? | The enthalpy change when 1 mole of a compound is formed from its elements in standard states and conditions. |
| What is the Enthalpy change of ATOMISATION of an ELEMENT? | The enthalpy change when 1 mole of gaseous atoms is formed from an element in standard states. |
| What is the First Ionisation Enthalpy? | The enthalpy change when 1 mole of gaseous +1 ions is formed from 1 mole of gaseous atoms. |
| What is the First Electron Affinity? | The enthalpy change when 1 mole of gaseous -1 ions is made from 1 mole of gaseous atoms. |
| What is the Enthalpy change of HYDRATION? | The enthalpy change when 1 mole of aqueous ions is formed from gaseous ions. |
| What is Bond Dissociation Enthalpy? | The enthalpy change when all the bonds of the same type in 1 mole of gaseous molecules are broken. |
| What is Enthalpy change of ATOMISATION of a COMPOUND? | The enthalpy change when 1 mole of a compound in the standard state is converted to gaseous atoms. |
| What is the SECOND ionisation enthalpy? | The enthalpy change when 1 mole of gaseous +2 ions is formed from 1 mole of gaseous +1 ions. |
| What is the SECOND electron affinity? | The enthalpy change when 1 mole of gaseous -2 ions is made from 1 mole of -1 ions. |
| What is the enthalpy change of SOLUTION? | The enthalpy change when 1 mole of solute is dissolved in sufficient solute that no further enthalpy change occurs on further dilution. |
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