Heat Transfer Concepts & Quiz Mechanical Engineering Notes | EduRev

Mechanical Engineering : Heat Transfer Concepts & Quiz Mechanical Engineering Notes | EduRev

 Page 1


Reading Quiz 
• 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


Reading Quiz 
• 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


Reading Quiz 
• 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


Reading Quiz 
• 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


Reading Quiz 
• 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. 
Read More
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