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Heat of reactions
Question | Answer |
---|---|
Define heat of reaction | The heat change when the number of moles of reactants indicated in the balanced equation react completely |
Define heat of combustion | The heat change when one mole of a substance is burned completely in excess oxygen |
What apparatus is used to measure heat of combustion? | Bomb calorimeter |
What is a kilogram calorific value? | The heat energy of the fuel produced when one kilogram of it is burned completely in excess oxygen |
What is bond energy? | The average energy required to break one mole of a particular covalent bond and to completely separate the neutral atoms |
Define heat of neutralisation | The heat change when one mole of H+ ions react with one mole of OH- ions |
Give an equation for heat given out | Mass*specific heat capacity*rise in temperature |
Define heat of formation | The heat energy given out when one mole of the reactants react with eachother to form a new compound |
What is Hess's law | The sum of heat changes if a reaction takes place in stages is equal to that if it had taken place continuously |
Law of conservation of energy | Energy cannot be created not destroyed only changed from one form to another |