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15 questions
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A calorimeter holds 125 g water at 22.0°C. A 45 g sample of silver at 130.0°C is added to the water, and the final temperature of the water and silver is 24.2°C. The specific heat of water is 4.18 J/g°C. What is the specific heat of silver?
0.241 J/g°C
2.16 J/g°C
51.8 J/g°C
558 J/g°C
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How does an exothermic reaction compare with an endothermic reaction?
Both changes absorb energy as reactants become products.
Both changes release energy as reactants become products.
An exothermic reaction absorbs energy, and an endothermic reaction releases energy.
An endothermic reaction absorbs energy, and an exothermic reaction releases energy.
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What observation would indicate that an endothermic reaction is occurring in a beaker?
The beaker glows.
The contents of the beaker become a solid.
The contents of the beaker change color.
The beaker feels cool.
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Which statement correctly describes an endothermic process?
Energy is absorbed.
Energy is released.
Matter is absorbed.
Matter is released.
Where is chemical potential energy stored?
in atoms
in thermal energy
in chemical reactions
in chemical bonds
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