Question

Chemical reactions and equations notes for 0 science notes

Answer 1

continuation

after corrosion

PREVENTION

painting

galvanization

oiling

greasing

.

RANCIDITY

oxidation of oil or fat in a food resulting into a bad smell and taste

or

the food spoil due to oxidation

PREVENTION

adding antioxidants

vaccum packing

replacing air by nitrogen

refrigeration of food stuff

EXOTHERMIC AND ENDOTHERMIC

EXOTHERMIC REACTION

in any reaction if heat is released this known as exothermic reaction

eg CaO+H2Ogives Cu(OH)2 (deltaH is -10j)

endothermic reaction

in any reaction if heat is absorbed is known as endothermic reaction

eg caco3 gives CaO +co2( Delta H is +20)