Matter and Energy Change
Presentation
•
Chemistry
•
11th Grade
•
Medium
Shahinaz Shetta
Used 4+ times
FREE Resource
8 Slides • 9 Questions
1
Energy and Change
What is Energy
Energy is the capacity to do work or the ability to cause change. Energy is measured in Joules.
Physical and Chemical changes involve changes in energy.
A physical change does not involve changing the identity of the substance while a chemical change does.
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2
Multiple Choice
Chopping Wood is a
Chemical Change
Physical Change
3
Every Change in Matter involves a Change in Energy
Law of Conservation of Energy.
Forms of Energy.
Potential
Kinetic
Subject | Subject
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4
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Conservation of Energy in Chemical Reactions
5
Energy is released by the system to the surrounding.
Final change in energy is negative.
Exothermic
Energy is absorbed by the system from the surrounding.
Final change in energy is positive
Endothermic
Types of Energy Changes
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6
Multiple Choice
Boiling is an exothermic process
True
False
7
Multiple Choice
Freezing is an Exothermic process
True
False
8
Heat
Heat is the transferred between two objects that are different in temperature.
Energy is always transferred from objects with high temperature to the objects with lower energy.
Subject | Subject
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9
Temperature
Temperature is a measure of the average kinetic energy of a substance.
The higher the kinetic energy the higher the temperature.
Units of Temperature
Celsius
Kelvin: T(K)= t(C) +273
O Kelvin is known as Absolute Zero
Subject | Subject
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10
Fill in the Blanks
Type answer...
11
Heating Curves
What is the MP and BP shown in this graph?
12
Multiple Choice
The temperature remains constant during phase changes
True
False
13
Multiple Choice
As the substance is heated and approaches its melting point the kinetic energy of its particles
Increases
Decreases
Stays the same
14
Multiple Choice
The energy added during boiling is expressed as
Kinetic energy
Potential energy
15
Heat Transfer Affects Substances Differently
Some substances are heat up more quickly than others, depending a characteristic property called Specific Heat Capacity (c).
Specific heat capacity is the amount of energy needed to change the temperature of 1g of a substance by 1degree celsius or Kelvin.
Subject | Subject
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16
Multiple Choice
Metals change in their temperature quickly because it has a --------
low specific heat capacity
high specific heat capacity
17
Multiple Choice
On a hot summer day the sand on the beach is much hotter than the seawater because
water has a low specific heat capacity
water has a high specific heat capacity and sand has a low specific heat capacity
sand has a high specific heat capacity
none
Energy and Change
What is Energy
Energy is the capacity to do work or the ability to cause change. Energy is measured in Joules.
Physical and Chemical changes involve changes in energy.
A physical change does not involve changing the identity of the substance while a chemical change does.
Some text here about the topic of discussion
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