c3.2, c3.3, c3.4

Question 1

define endothermic

Answer 1

the temperature of the reaction mixture decreases. The heat is taken in from the surroundings.

Question 2

give an example of an endothermic reaction

Answer 2

photosynthesis

Question 3

what kind of reaction are electrolysis and thermal decomposition?

Answer 3

endothermic, but they don’t have a temperature decrease. The energy taken in is used to break down substances

Question 4

define exothermic

Answer 4

the temperature of the reaction mixture increases. The heat is given out to the surroundings.

Question 5

give an example(s) of exothermic reaction

Answer 5

combustion / neutralisation