completely burned in excess -346 kJ oxygen 123 kJ The enthalpy change per mole of formed when an acid is 8 In an experiment to calculate the neutralised by an alkali enthalpy of combustion, of the following does not need to 7 Given that the energy change be recorded? when a carbon to carbon single The mass of water bond is broken is +346 kJ, what is The final temperature of the the enthalpy change when a water carbon to carbon single bond is The boiling point of the fuel formed from two separate atoms? 346 kJ 9 Why are some bond enthalpies quoted as a 'mean bond enthalpy'? They are the average of the enthalpies of all the bonds in the molecule may have different enthalpies in different molecules The bond enthalpies cannot be accurately measured 10 The enthalpy changes for the formation of one mole of aluminium oxide and one mole of iron(III) oxide are shown below. Based on these equations, what is the enthalpy change for the following reaction? 4 - Oxidising and reducing agents Oxidation and reduction reactions play important roles in chemistry. These reactions involve the loss of electrons in the case of oxidation or the gain of electrons in reduction reactions. Oxidation and reduction reactions can be brought about by chemicals known as oxidising and reducing agents.
completely burned in excess oxygen The enthalpy change per mole of formed when an acid is neutralised by an alkali 7 Given that the energy change when a carbon to carbon single bond is broken is +346 kJ, what is the enthalpy change when a carbon to carbon single bond is formed from two separate atoms? 346 kJ -346 kJ 123 kJ 8 In an experiment to calculate the enthalpy of combustion, of the following does not need to be recorded? The mass of water The final temperature of the water The boiling point of the fuel 9 Why are some bond enthalpies quoted as a 'mean bond enthalpy'? They are the average of the enthalpies of all the bonds in the molecule may have different enthalpies in different molecules The bond enthalpies cannot be accurately measured 10 The enthalpy changes for the formation of one mole of aluminium oxide and one mole of iron(III) oxide are shown below. Based on these equations, what is the enthalpy change for the following reaction? 4 - Oxidising and reducing agents Oxidation and reduction reactions play important roles in chemistry. These reactions involve the loss of electrons in the case of oxidation or the gain of electrons in reduction reactions. Oxidation and reduction reactions can be brought about by chemicals known as oxidising and reducing agents.
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