Exothermic and Endothermic Reactions
Chemistry ⇒ Chemical Reactions and Equations
Exothermic and Endothermic Reactions starts at 8 and continues till grade 12.
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A chemical cold pack contains ammonium nitrate and water. When activated, the pack becomes cold. What type of reaction is occurring?
A student mixes barium hydroxide and ammonium chloride and observes the beaker becomes very cold. Is this reaction exothermic or endothermic?
A student observes that when hydrochloric acid is added to zinc, the test tube becomes warm. What type of reaction is this?
Calculate the enthalpy change (ΔH) for a reaction if the energy of reactants is 200 kJ and the energy of products is 150 kJ. State whether the reaction is exothermic or endothermic.
Describe the energy profile diagram of an exothermic reaction.
A chemical cold pack contains ammonium nitrate and water. When activated, the pack becomes cold. What type of reaction is occurring?
A student mixes barium hydroxide and ammonium chloride and observes the beaker becomes very cold. Is this reaction exothermic or endothermic?
A student observes that when hydrochloric acid is added to zinc, the test tube becomes warm. What type of reaction is this?
Which of the following is an example of an endothermic reaction? (1) Neutralization (2) Respiration (3) Electrolysis of water (4) Combustion of hydrogen
Which of the following is an example of an exothermic reaction? (1) Decomposition of silver chloride in sunlight (2) Burning of natural gas (3) Photosynthesis (4) Electrolysis of water
Which of the following is an exothermic reaction? (1) Photosynthesis (2) Combustion of methane (3) Melting of ice (4) Evaporation of water
Which of the following is NOT an example of an exothermic process? (1) Freezing of water (2) Condensation of steam (3) Melting of ice (4) Combustion of wood
Fill in the blank: In an exothermic reaction, the energy of the products is __________ than that of the reactants.
Fill in the blank: In an exothermic reaction, the enthalpy change (ΔH) is __________.
Fill in the blank: Photosynthesis is an __________ reaction because it requires energy from sunlight.
Fill in the blank: The combustion of glucose during respiration is an __________ reaction.
True or False: In an endothermic reaction, energy is absorbed from the surroundings.
True or False: In an endothermic reaction, the products have more energy than the reactants.
True or False: The decomposition of calcium carbonate (CaCO₃) to calcium oxide (CaO) and carbon dioxide (CO₂) is an endothermic reaction.
True or False: The process of evaporation of water is an exothermic process.
