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CHE 1211 Gen > Ch. 5 > Flashcards

Ch. 5 Flashcards

1
Q

This is defined as the capacity to do work or transfer heat.

A

Energy

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2
Q

All forms of energy are either _____ or _____.

A

Kinetic or potential

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3
Q

This is the energy that results from motion.

A

Kinetic

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4
Q

What is the equation for kinetic energy?

A

Ek=1/2mu^2

m=mass of the object
u= velocity

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5
Q

What are the units of measure for energy?

A

Joule

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6
Q

The kinetic energy associated with the random motion of a collection of atoms and molecules.

A

Thermal energy.

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7
Q

How are changes in Herman energy monitored?

A

By measuring temperature changes

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8
Q

Why is it called thermal dynamics?

A

Because energy increases as you increase temperature.

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9
Q

This is the energy possessed by an object by virtue if it’s position.

A

Potential energy

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10
Q

What are the two forms of potential energy?

A

Chemical and Electrostatic

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11
Q

This is energy stored within the structural units of chemical substances.

A

Chemical energy

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12
Q

The amount of chemical energy in matter depends on what?

A

The types of arrangements of atoms in the structural units that make up the sample.

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13
Q

This is potential energy that results from the interaction of charged particles?

A

Electrostatic Energy

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14
Q

Electrostatic energy are _____ bonds.

A

Ionic

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15
Q

Chemical energy is ____ bonds.

A

Covalent

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16
Q

Oppositely charged particles attract each other and like particles repel each other in _____ energy.

A

Electrostatic

17
Q

The magnitude of the resulting electrostatic potential energy is proportional to the product of the two charges divided by the distance between them. This describes what law?

A

Coulombs Law

18
Q

What is the equation for electrostatic energy?

A

Eel=Q1*Q2/d

19
Q

Eel is negative for attraction because Q1 and Q2 have ____ signs.

A

Opposite

20
Q

Eel is positive for repulsion because Q1 and Q2 have the _____ sign.

A

Same

21
Q

A ball rolling down a hill and back up an identical hill converts potential energy to kinetic energy and back to potential energy. Is an example of what?

A

Interconvertible Kinetic and potential energy.

22
Q

A process in which two things are converted into the other.

A

Interconvertible

23
Q

A chemical reaction that gives off heat converts chemical energy (potential energy) to thermal energy (kinetic) is an example of?

A

Interconvertible

24
Q

U of a system is the sum of the kinetic and potential energies for the system. U=?

A

Internal energy

U= kinetic + potential

25
Q

The total amount of energy in the universe is constant. When energy of one form disappears the same amount of energy much appear in another form or forms. This is known as what principle.

A

The law of conservation of energy

26
Q

This is defined as the specific part of the universe that is of interest to us.

A

The system

27
Q

The rest of the universe outside the system constitutes the _____.

A

Surroundings.

28
Q

This is the transfer of thermal energy between two bodies that are at different temperature.

A

Heat

29
Q

This is the study of heat in chemical reactions.

A

Thermochemistry

30
Q

This is a process that gives off heat. The reactants have a higher energy than the product.

A

Exothermic.

31
Q

Which types of reactions are exothermic?

A

Combustion reactions

32
Q

This is a chemical process that absorbs thermal energy as heat. The products have a higher energy than the reactant.

A

Endothermic process.

33
Q

What types of reactions are endothermic?

A

Decomposition reactions

34
Q

What is the SI unit of energy?

A

Joule

1J = 1N*m

35
Q

Attraction is a force… force =?

A

Energy/distance

36
Q

1 cal= ____ J
1 Cal = —— cal
1Cal = _____ J

A

4.184
1000
4184

CHE 1211 Gen (8 decks)

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