Endothermic or Exothermic reaction
A hot pack becomes warm after being activated.
exo
Barium + oxygen → __________________________
Barium + oxygen → barium oxide
magnesium + steam → __________________________ + __________________________
magnesium + steam → magnesium oxide + hydrogen
Magnesium + Hydrochloric acid → ________________________ + __________________________
Magnesium + Hydrochloric acid → magnesium chloride + hydrogen
Calcium carbonate + Hydrochloric acid _______________________ + _______________________
Calcium carbonate + Hydrochloric acid → calcium chloride + carbon dioxide + water
Water vapor changes into liquid water during rain formation
exothermic
Potassium + Oxygen → __________________________
potassium oxide
aluminium + steam → __________________________ + __________________________
aluminium + steam → aluminium oxide + hydrogen
Zinc + Sulfuric acid → ________________________ + __________________________
Zinc + Sulfuric acid → zinc sulfate + hydrogen
Sodium carbonate + Nitric acid _______________________ + _______________________
Sodium carbonate + Nitric acid → sodium nitrate + carbon dioxide + water
Ice cream begins to melt after being left outside the freezer.
endothermic
____________ + Oxygen → Lithium oxide
lithium
sodium + ______________________ → ______________________+ hydrogen
sodium + water → sodium hydroxide + hydrogen
. Aluminum + Nitric acid → ________________________ + __________________________
Aluminum + Nitric acid → aluminum nitrate + hydrogen
Magnesium carbonate + Sulfuric acid _______________________ + _______________________
Magnesium carbonate + Sulfuric acid → magnesium sulfate + carbon dioxide + water
A student notices that a chemical reaction makes the container feel cold.
Endothermic
____________ + Oxygen → Copper oxide
copper
calcium + steam → __________________________ + __________________________
calcium + steam → calcium oxide + hydrogen
Magnesium oxide + Hydrochloric acid_______________________ + _________________________
Magnesium oxide + Hydrochloric acid → magnesium chloride + water
Zinc carbonate + Hydrochloric acid _______________________+ _______________________
Zinc carbonate + Hydrochloric acid → zinc chloride + carbon dioxide + water
Molten candle wax hardens after the candle is turned off.
exothermic
Phosphorus + ____________ → Phosphorus oxide
oxygen
potassium + water → __________________________ + __________________________
potassium + water → potassium hydroxide + hydrogen
Zinc oxide + Sulfuric acid _______________________+ _________________________
Zinc oxide + Sulfuric acid → zinc sulfate + water
Potassium carbonate + Sulfuric acid _______________________ + _______________________
Potassium carbonate + Sulfuric acid → potassium sulfate + carbon dioxide + water