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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See sample questions for grade 8
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. What type of reaction is this?
A student observes that when two chemicals are mixed, the temperature of the mixture increases. What type of reaction is this?
Describe the energy changes that occur during 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. What type of reaction is this?
A student observes that when two chemicals are mixed, the temperature of the mixture increases. What type of reaction is this?
When ammonium nitrate is dissolved in water, the temperature of the solution decreases. Is this process exothermic or endothermic?
Which of the following best describes an exothermic reaction? (1) It absorbs heat (2) It releases heat (3) It requires light (4) It produces cold
Which of the following is a characteristic of endothermic reactions? (1) Release of heat (2) Absorption of heat (3) Production of light (4) Increase in temperature of surroundings
Which of the following is a sign of an exothermic reaction? (1) The container feels cold (2) The container feels warm (3) The reaction absorbs light (4) The reaction absorbs sound
Which of the following is an endothermic reaction? (1) Burning of paper (2) Cooking an egg (3) Neutralization (4) Rusting of iron
Fill in the blank: Combustion reactions are always __________.
Fill in the blank: In an endothermic reaction, the products have __________ energy than the reactants.
Fill in the blank: In an exothermic reaction, the temperature of the surroundings usually __________.
Fill in the blank: The energy change in a chemical reaction is called the __________ change.
Is the process of dissolving sodium hydroxide in water exothermic?
Is the reaction of quicklime (calcium oxide) with water to form slaked lime (calcium hydroxide) exothermic?
State whether the following statement is true or false: All chemical reactions are either exothermic or endothermic.
State whether the following statement is true or false: Endothermic reactions can cause the temperature of the surroundings to drop.
