Steam at 60 bar, 350°C has a specific enthalpy of? Select one: O a. 3045 kJ/kg O b. 2792 kJ/kg O c. 3177 kJ/kg* O d. 3070 kJ/kg e. 2784 kJ/kg

11. An empty flask has a mass of 48.283g and 48.612g when filled with acetone vapor at 80°C and728mmHg. If the volume of the flask is 227.5mL, what is the molecular weight of the acetone?a. 43.7497kg/kmol b. 38.6978kg/kmol c. 42.4760kg/kmol d. 43.8075kg/kmol

28.) Air at 250K and 300 kPa is heated at constant pressure to 500K. Determine the change in enthalpy of air per unit mass (using Table A-17) a. 252.97 kJ/kg b. 267.65 kJ/kg c. 203.04 kJ/kg d. 250.51 kJ/kg

Option (b) seems to be correct.