Q1.1 A mixture of dray air and water vapour is at a temperature of 25o under a total

pressure of 100 kPa. The dew-point temperature is 10 oC. Find

1) partial pressure of the water vapour;

2) relative humidity (38.74%);

3) specific humidity (0.00773); and

4) specific volume of the dray air (R air =0.287 kJ/kg-K).