7. Thermal decomposition reactions do not need a supply of heat to keep going.
False
True
8. Why do some sweets cause a cooling effect in your mouth?
Because this causes an endothermic reaction
Because this causes an exothermic reation
9. A reversible reaction that is endothermic in one way, must be.............in the other
exothermic
endothermic
10. Increasing the temperature...........the amount of products from the endothermic reaction.
increases
decreases
11. Decreasing the temperature..........the amount of products from the exothermic reaction.
increases
decreases
12. This means that we can change the......of the reaction by changing the temperature.
conditions
yield
pressure
13. For reversible reactions involving gases, increasing the pressure..........the yield of the reaction that produces the smaller number of gas molecules.
increases
decreases
14. The conditions for industrial processes are chosen to give as much product as possible, as quickly as possible.....
at a reasonable cost
for the lowest cost
whatever the cost
15. the reaction to produce ammonia is.............
exothermic
endothermic
16. Changing the pressure only affects the yield in reactions with different numbers of molecules of gases in the reactants compared with the products.
