When heated to 150 Degree Celsius, CuSO4· 5H2O loses its water of hydration as gaseous H2O. A 2.73 g sample of the compound is placed in a sealed 4.00 L steel vessel containing dry air at 1.00 bar and 27 degree Celsius and the vessel is heated to 227 degree Celsius. What is the partial pressure of H2O (in bar)?