Select the volume in m3 that is closest to the volume occupi

Select the volume (in m^3) that is closest to the volume occupied by 0.7 kg of H_2O at a pressure of 6 MPa and a temperature of 316degreeC. 0.0382 0.0267 0.024 0.0277

Solution

Given P = 6 MPa

T = 316 ^oC = 589 K

m= 0.7 kg

Gas constant for H₂O vapour = 461.5 J/Kg.K

we know that

PV = mRT

V = mRT/P

V = ( 0.7*461.5*589)/(6*10⁶)

V = 0.03171 m³

option A is correct answer