chem chap 13 - chemical energetics

Question 1

what do endothermic charges do?

Answer 1

absorb the energy from surroundings
decrease temperature of surroundings

Question 2

name some examples of chemical reactions involving endothermic charges

Answer 2

thermal decomposition
photosynthesis

Question 3

name some examples of physical reactions involving endothermic charges

Answer 3

boiling, melting, sublimation
dissolution of some ionic compounds in water

Question 4

what do exothermic charges do

Answer 4

release energy to surroundings
increase temperature of surroundings

Question 5

name some examples of chemical reactions involving exothermic charges

Answer 5

combustion
neutralisation
respiration

Question 6

name some examples of physical reactions involving exothermic charges

Answer 6

freezing
condensation
dissolution of acids and alkalis in water