PhysicsLAB Worksheet
Heat Cycles

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Which graph best represents the relationship between volume and absolute temperature for a fixed mass of an ideal gas at constant pressure?
 
Which graph best represents the relationship between pressure and volume for a fixed mass of an ideal gas at constant temperature?
 
In a heat engine, the piston compresses gases in the cylinder. Why does the temperature of the gases increase during the process?



 
A cylinder fitted with a piston contains a fixed amount of gas. Heat is added to the gas, causing it to expand and raise the piston. If all of the added heat is converted into work done in raising the piston, the internal energy of the gas will
 
Refer to the following information for the next eleven questions.

 
A monatomic gas is confined to a cylindrical container having a movable, yet "snuggly-fitting," lid that slides up and down to accommodate changes in pressure and volume. The diagram shown below, outlines the steps in a heat cycle starting at position A and moving through positions B, C, D and then back to A.


If the temperature of point C is 900 K, what is the temperature of point A? 

How many moles of gas are present in the cylinder? 

What is the change in internal energy of the gas during process BC? 

What is the change in internal energy of the gas for an entire cycle, ABCDA? 

What net work is done by the gas on the piston during one complete cycle, ABCDA? 

During which processes is heat being removed from the system?
 
During which process is the greatest amount of heat added? 

How much total heat is added during the cycle? 

What is the ideal Carnot efficiency for this cycle? 

What is the actual efficiency of this heat cycle? 

Substitute Certification 








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