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© Copyright Pearson Prentice Hall
>The Flow of Energy—Heat and Work Energy Transformations
Heat, represented by q, is _______________
that transfers from one object to another
because of a _____________
______________ between them.
Heat ___________ flows from
a _________ object to a
____________ object.
17.1
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© Copyright Pearson Prentice Hall
>The Flow of Energy—Heat and Work Energy Transformations
________________________ is the study of
______________ changes that occur during
chemical reactions and changes in state.
The energy stored in the chemical bonds of
a substance is called
____________________
_____________________ energy.
17.1
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© Copyright Pearson Prentice Hall
>The Flow of Energy—Heat and Work Energy Transformations
When fuel is burned in a car engine, chemical potential energy is released and is used to do work.
17.1
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>The Flow of Energy—Heat and Work Exothermic and Endothermic Processes
In an _____________ process,
the system ___________ heat as
the surroundings cool down.
In an ______________ process,
the system ____________ heat as
the surroundings heat up.
17.1
Slide 5 of 34
© Copyright Pearson Prentice Hall
>The Flow of Energy—Heat and Work Exothermic and Endothermic Processes
In studying energy changes, you can define a
____________ as the part of the universe on which
you ________ your attention. The
________________ include everything else in the
universe.
The law of conservation of energy states that in
any chemical or physical process, energy is neither
___________ nor ______________.
17.1
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© Copyright Pearson Prentice Hall
>The Flow of Energy—Heat and Work Exothermic and Endothermic Processes
An endothermic process is one that
________________ heat from the surroundings.
17.1
An exothermic process is one that
___________ heat to its surroundings.
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Slide 7 of 34
Conceptual Problem 17.1
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Slide 8 of 34
Practice Problems for Conceptual Problem 17.1
Problem Solving 17.1 Solve Problem 1 with the help of an interactive guided tutorial.
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© Copyright Pearson Prentice Hall
>The Flow of Energy—Heat and Work Units for Measuring Heat Flow
Heat flow is measured in two
common units, the __________
and the _____________.
The energy in food is usually
expressed in Calories.
17.1
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>The Flow of Energy—Heat and Work Heat Capacity and Specific Heat
The __________ ______________ of an
object depends on both its ___________
and its _______________ composition.
The amount of heat needed to increase
the temperature of an object exactly 1°C
is the ___________ ________________
of that object.
17.1
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© Copyright Pearson Prentice Hall
>The Flow of Energy—Heat and Work Heat Capacity andSpecific Heat
The specific heat capacity, or simply the
____________ _________________, of a
substance is the amount of heat it takes to raise
the temperature of ___ g of the substance
___°C.
17.1
Slide 12 of 34
© Copyright Pearson Prentice Hall
>The Flow of Energy—Heat and Work Heat Capacity andSpecific Heat
Water ______________ a lot of heat as it cools. During
freezing weather, farmers protect citrus crops by spraying
them with water.
17.1
Because it is mostly water, the ___________ of
a hot apple pie is much more likely to burn your
tongue than the _____________.
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© Copyright Pearson Prentice Hall
>The Flow of Energy—Heat and Work Heat Capacity and Specific Heat
17.1
© Copyright Pearson Prentice Hall
SAMPLE PROBLEM
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17.1
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Practice Problems for Sample Problem 17.1
