A. temperature rises by 3 $$\degree C$$    

B. temperature falls by 5 $$\degree C$$   

C. temperature falls by 3 $$\degree C$$    

D. temperature rises by 5 $$\degree C$$  

A. endothermic  

B. equilibrium   

C. electrolytic  

D.  exothermic

A. melting an ice-cube  

B. lighting a match  

C. cooling a cup of tea                    

D. dissolving sugar in coffee

A. temperature falls by 3 $$\degree C$$    

B. temperature rises by 5 $$\degree C$$

C. temperature falls by 5 $$\degree C$$

D. temperature rises by 3 $$\degree C$$

A. exothermic    

 B. activated  

C. decomposition            

D. endothermic

A. evaporation

B. burning

C. insulation

D. melting

A.    more energy is released when new bonds are formed than is taken in when existing bonds in the reactants are broken

B.    exothermic changes always produce gases

C.    energy is always released in a chemical change which makes new substances

D.    in an exothermic change the products are more stable than the reactants

A.   in an endothermic change the products are less stable than the reactants

B.   less energy is released when new bonds are formed than is taken in when existing bonds in the reactants are broken

C.   energy is always absorbed in a chemical change which makes new substances

D.   endothermic changes always produce energy

A.      a precipitation

B.     a reversible reaction

C.      an endothermic reaction

D.      an exothermic reaction

A.   change 1 is exothermic; change 2 is endothermic

B.   change 1 is endothermic; change 2 is exothermic  

C.   change 1 is endothermic; change 2 is endothermic

D.   change 1 is exothermic; change 2 is   exothermic