Daily Practice · GCSE Science

Daily Practice - GCSE Science

4th December 1998

5 questions · GCSE · 584 questions in this band

1
Energy Changes
A reaction profile shows the reactants at 220 kJ and the products at 340 kJ. State whether the reaction is exothermic or endothermic.
2
Exothermic and Endothermic Reactions
State what is meant by the activation energy of a reaction.
3
Bond Energies, Cells and Fuel Cells
State whether forming a new chemical bond requires energy or releases energy.
4
Rate and Extent of Chemical Change
State the four factors that can increase the rate of a chemical reaction.
5
Rates of Reaction
State the condition, in terms of energy, that colliding particles must meet for a reaction to occur.

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