For the air-water vapour mixture defined below, calculate the properties listed in each case and check solutions by reference to a psychrometric chart. TDB = 35 C, TWB = 25 C and P = 1.01325 bar

Find (i) relative humidity (ii) humidity ratio (moisture content) (iii) specific volume (iv) specific enthalpy

Do not use a psychrometric chart, only by calculation.

You have dry bulb temperature and wet bulb temperature, what more information do you need to calculate relative humidity.