Daily Practice · GCSE Science

Daily Practice - GCSE Science

Biology, chemistry and physics recall, definition and calculation, drawn from every strand.

18th March 2016

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
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
A tangent drawn to a volume-time graph at 15 seconds passes through the points (5 s, 6 cm3) and (25 s, 66 cm3). Calculate the rate of reaction at 15 seconds.

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