Thermodynamics Practice - Nevada Joint Union High School District

bankercordMechanics

Oct 27, 2013 (3 years and 9 months ago)

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Name ________________________________________________ per. _________ Date ____________________


Thermodynamics


1.

What is the First Law of Thermodynamics?



2.

Use the First Law of Thermodynamics to determine the change in internal energy in

a system if 1250 J of heat is added to a system and 500 J of work are done by the
system.

Show your work




3.

Restate the First Law of Thermodynamics in terms of work done on a system.



4.

What is the Second Law of Thermodynamics?



5.

What is Entropy? How do
es it relate to the Second Law of Thermodynamics?




6.

Find the change in entropy if
770 kJ of heat are used to completely melt 2.3 kg of ice
at a temperature of 273 K
. Show your work.




7.

Does entropy increase or decrease when stem condenses into water?
Explain.




8.

What is a heat engine?



9.

Find the work done by a heat engine if 500 J of heat are added to the system and

230 J of heat are expelled at a lower temperature.

Show your work.




10.

What is the ideal efficiency of a heat engine?




11. Is it pos
sible for a heat engine to achieve ideal efficiency? Explain.