Daily Practice

GCSE Science

24th April 1993

5 questions · GCSE · 584 questions in this band

1
Energy Changes
Using the values in the previous question, calculate the overall energy change for the reaction.
2
Exothermic and Endothermic Reactions
On a reaction profile diagram, the reactants are drawn at a higher energy level than the products. State whether the reaction is exothermic or endothermic.
3
Bond Energies, Cells and Fuel Cells
State the difference between a rechargeable cell and a non-rechargeable cell.
4
Rate and Extent of Chemical Change
State the equation for the mean rate of a reaction in terms of the quantity of reactant used.
5
Rates of Reaction
In the disappearing cross required practical, state the dependent variable that is measured.

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