Daily Practice · GCSE Science

Daily Practice - GCSE Science

5th September 1996

5 questions · GCSE · 584 questions in this band

1
Energy Changes
A reaction profile shows the reactants at 150 kJ and the peak (activation energy point) at 195 kJ. Calculate the activation energy.
2
Exothermic and Endothermic Reactions
State the energy transfer that occurs during an exothermic reaction.
3
Bond Energies, Cells and Fuel Cells
State one factor that affects the size of the voltage produced by a chemical cell.
4
Rate and Extent of Chemical Change
State two units that the rate of a reaction can be measured in.
5
Rates of Reaction
Explain why increasing temperature increases the rate of a reaction, referring to both the frequency and the energy of collisions.

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