Heat Transfer Concepts & Quiz

# Heat Transfer Concepts & Quiz - Mechanical Engineering

``` Page 1

• A container of helium gas is heated,
raising the temperature of the gas. This
causes
• the average kinetic energy of the gas molecules
to increase.
• the average potential energy of the gas
molecules to increase.
• the average acceleration of the gas molecules to
increase
Page 2

• A container of helium gas is heated,
raising the temperature of the gas. This
causes
• the average kinetic energy of the gas molecules
to increase.
• the average potential energy of the gas
molecules to increase.
• the average acceleration of the gas molecules to
increase
The internal energy U of a system is increased by
the transfer of either heat or work into the system.

?U = Q -W
Frist Law of Thermodynamics
Internal Energy = Added Heat - Work done by the system
Page 3

• A container of helium gas is heated,
raising the temperature of the gas. This
causes
• the average kinetic energy of the gas molecules
to increase.
• the average potential energy of the gas
molecules to increase.
• the average acceleration of the gas molecules to
increase
The internal energy U of a system is increased by
the transfer of either heat or work into the system.

?U = Q -W
Frist Law of Thermodynamics
Internal Energy = Added Heat - Work done by the system
A falling mass turns a paddle in an insulated beaker of
water in this schematic representation of Joule’s
apparatus for measuring the temperature increase
produced by doing mechanical work on a system.
Page 4

• A container of helium gas is heated,
raising the temperature of the gas. This
causes
• the average kinetic energy of the gas molecules
to increase.
• the average potential energy of the gas
molecules to increase.
• the average acceleration of the gas molecules to
increase
The internal energy U of a system is increased by
the transfer of either heat or work into the system.

?U = Q -W
Frist Law of Thermodynamics
Internal Energy = Added Heat - Work done by the system
A falling mass turns a paddle in an insulated beaker of
water in this schematic representation of Joule’s
apparatus for measuring the temperature increase
produced by doing mechanical work on a system.
Steam issuing from the kettle makes the pinwheel
turn in this simple steam turbine. Work could be
done to lift a small weight with such an engine.
Page 5

• A container of helium gas is heated,
raising the temperature of the gas. This
causes
• the average kinetic energy of the gas molecules
to increase.
• the average potential energy of the gas
molecules to increase.
• the average acceleration of the gas molecules to
increase
The internal energy U of a system is increased by
the transfer of either heat or work into the system.

?U = Q -W
Frist Law of Thermodynamics
Internal Energy = Added Heat - Work done by the system
A falling mass turns a paddle in an insulated beaker of
water in this schematic representation of Joule’s
apparatus for measuring the temperature increase
produced by doing mechanical work on a system.
Steam issuing from the kettle makes the pinwheel
turn in this simple steam turbine. Work could be
done to lift a small weight with such an engine.
Heat released by
burning gasoline in the
cylinder of an
automobile engine
causes the piston to
move, converting some
of the heat to work.
```

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