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Energy in Chemical Reactions — Test Answers

24 verified answers
22
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Which statement defines calorimetry?

A
a device that is used to measure the heat that is gained or lost during a chemical change
B
the conservation of energy
C
a unit of energy that is used when calculating energy exchange
D
the measurement of energy that is given off or absorbed in a physical or chemical process
23
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A welding torch produces a flame by burning acetylene fuel in the presence of oxygen. This flame is used to melt a metal. Which energy transformation represents this process?

A
kinetic energy into electromagnetic energy
B
potential energy into chemical energy
C
kinetic energy into potential energy
D
chemical energy into thermal energy
24

How should the baking of a pizza be categorized?

A
as an exothermic process because the dough releases heat
B
as an endothermic process because the dough absorbs heat
C
as an endothermic process because the dough releases heat
D
as an exothermic process because the dough absorbs heat
25

From first to last, which lists the order in which these samples will reach 90 point 0 times degree C ?

A
Al , Fe , Ag , Zn
B
Ag , Zn , Fe , Al
C
Ag , Al , Zn , Fe
D
Al , Fe , Zn , Ag

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Energy in Chemical Reactions — Test Answers…