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6. What is the standard enthalpy of combustion?

  • is the enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard conditions, all reactants and products being in their gaseous states
  • is the enthalpy change that takes place when one mole of metal reacts completly under oxygen under standard state, all reactants and products being in their gaseous states

7. What is the enthalpy change of formation?

  • the enthalpy change that takes place when one mole of a compound its standard state is formed from its constituent atoms.
  • the enthalpy change that takes place when one mole of a compound its standard state is formed from its constituent elements under standard conditions in their standard state.
  • the enthalpy change that takes place when one mole of a compound its standard state is formed from its constituent elements.
  • enthalpy change that takes place when one mole of a compund is formed from the constituent atoms under standard conditions in their standard states.

8. what is the enthalpy change of formation defined as?

  • 0 KJ mol -1
  • 200 KJ mol -1
  • 298 KJ mol -1
  • - 200 KJ mol -1

9. what is the equation to work out energy change? and what does it stand for?

  • mSΔT m- mass of compound, S - specific heat capacity, ΔT - temperature change
  • mCΔT m- mass of the surroundings, C - specific heat capacity, ΔT - temperature change
  • mHΔT m- mass of compound, H - specific heat capacity, ΔT - temperature change