10 kg of R-134a fill a 1.595-m^3 weighted piston-cylinder device at a pressure of 200 kPa. The container is now heated until the temperature is 30∘C. Determine the initial temperature and final volume of the R-134a.

A75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is to be replaced by a high-efficiency motor that has an efficiency of 95.4 percent. the motor operates 4368 hours a year at a load factor of 0.75. taking the cost of electricity to be $0.12/kwh, determine the amount of energy and money saved as a result of installing the high-efficiency motor instead of the standard motor. also, determine the simple payback period if the pu