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baam
Lose 20 points!
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shark
Other team loses 25 points!
Okay!
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fairy
Take points!
5
10
15
20
25
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banana
Go to last place!
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10
×
What are the products of a reaction between magnesium and hydrochloric acid?
Magnesium chloride and hydrogen
Magnesium hydroxide and hydrogen
Magnesium chloride and oxygen
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baam
Lose 5 points!
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seesaw
Swap points!
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gift
Win 20 points!
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baam
Lose 20 points!
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10
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What is released during combustion?
Nitrogen
Oxygen
Carbon dioxide and heat
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10
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Why does temperature increase during an exothermic reaction?
Reactants gain energy
Energy is released into the surroundings
Heat is absorbed into the surroundings
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10
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Which of the following would release energy when cooled?
Water boiling to steam
Steam condensing to water
Ice melting to water
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10
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Which of the following is an exothermic phase change?
Freezing of water
Melting of ice
Boiling of water
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10
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What happens to the temperature of the surroundings during an exothermic reaction?
It remains constant
It increases
It decreases
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10
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What is one way to prevent heat loss during an exothermic reaction experiment?
Use a metal container
Conduct the reaction in an open space
Use an insulated container
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10
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What is another name for combustion?
Rusting
Freezing
Burning
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10
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Which of the following is a common example of an exothermic reaction?
Dissolving salt in water
Photosynthesis
Respiration
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trap
No points!
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star
Double points!
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fairy
Take points!
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20
25
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banana
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10
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What is the general equation for combustion of a hydrocarbon?
Hydrocarbon + water â carbon dioxide + heat
Hydrocarbon + oxygen â carbon monoxide + heat
Hydrocarbon + oxygen â carbon dioxide + water + heat
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10
×
Which of the following reactions is exothermic?
Freezing of water
Melting of wax
Boiling of water
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baam
Lose 25 points!
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gift
Win 25 points!
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rocket
Go to first place!
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banana
Go to last place!
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10
×
Which of the following is an exothermic reaction?
Evaporation of water
Combustion of methane
Melting of ice
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