Five kilograms of liquid carbon tetrachloride undergo a mechanically reversible, isobaric change of state at 1 bar during which the temperature changes from 0°C to 20°C. Determine 
The properties for liquid carbon tetrachloride at 1 bar and 0°C may be assumed independent of temperature: ? = 
What will be an ideal response?
For an isobaric process with a substance with constant coefficient of thermal expansion, the change in volume is given by
Integrating this over finite temperature gives
So, when the temperature increases by 20 degrees, the specific volume change is given by
The initial specific volume is 
The final specific volume is then
So, the change in specific volume is 
and the change in total volume is 
The work done is simply 
(the carbon tetrachloride does 7.65 J of work on its surroundings when it expands by 
The heat required is 
(more than 1000 times greater than the work done).
The enthalpy change for the constant pressure process is equal to 
The internal energy change is 
As is generally the case for liquids, which are nearly incompressible, the internal energy change and the enthalpy change are almost identical.
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