WJEC GCSE Chemistry Rates, energy and equilibria (Unit 1.5, 2.4, 2.6) overview quiz quiz
16questions. Pick an answer and you'll see why right away.
What does the rate of a reaction measure?
On a graph of gas volume against time, what does a flat (horizontal) line mean?
What is the activation energy?
Why does increasing concentration increase the rate of reaction?
How does a catalyst increase the rate of a reaction?
Why does powdered solid react faster than a large lump of the same mass?
In an exothermic reaction, where are the products on a reaction profile?
Which reaction is endothermic?
Is breaking chemical bonds exothermic or endothermic?
The energy to break bonds is 2750 kJ and the energy released making bonds is 3000 kJ. What is the overall energy change?
What is true at dynamic equilibrium in a closed system?
For an exothermic forward reaction, what does raising the temperature do to the yield of product?
For N2 + 3H2 in equilibrium with 2NH3, what does increasing pressure do?
What are the conditions for the Haber process?
Why is a moderate temperature, not a low one, used in the Haber process?
Which three elements do NPK fertilisers supply?