Chemistry

1Given C + O₂ → CO₂ ΔH = −394 kJ and CO + ½O₂ → CO₂ ΔH = −283 kJ, ΔH for C + ½O₂ → CO is

2The burning of fuels is

3The heat of combustion of ethanol is −1,370 kJ/mol. Burning 4.6 g of ethanol (M = 46) releases

4The enthalpy of neutralisation of a strong acid and strong base is about

5Breaking chemical bonds

6When 50 cm³ of 1 M HCl reacts with 50 cm³ of 1 M NaOH, the temperature rises by 6.8 °C. The heat released is about (c = 4.2 J/g K; density 1 g/cm³)

7Hess's law states that the enthalpy change of a reaction

8Dissolving ammonium nitrate in water makes the solution

9Which process is endothermic?

10Hess's law states that the total enthalpy change of a reaction