State During a Process

State 1 represents subcooled liquid, where pressure and temperature are independent properties. As energy is put into the system, the temperature will rise until the liquid becomes saturated, as illustrated on the PT diagram. The volume also increases however, the magnitude of the change is small, since the volume of a liquid is relatively insensitive to temperature. 

Finally, state 5 is superheated vapor, which exists at a higher temperature than the saturated vapor. The increase in volume with temperature in the vapor phase is much more pronounced than it was for the liquid. How would you draw this process on a Tv diagram  

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