**PV = MRT**

**Where P is V is volume, M is mass, T is arxi R is the specific gas constant, which is equal to 287 J/kg-K for air.**

**Consider the piston-cylinder diagram below in State I and State 2, where the mass Of air inside cylinder is the same in both**

**a. Given the information at State 1, what is the temperature ofthe air in State 2?**

**b. What types of energy transfer proceses were involved in going from State 1 to 2?**

**What types of energy are important to consider in this example?**

**Answer:**

**piston-cylinder thermodynamics**