36 g of water at 30c are converted into steam at 250c at

Question

36 g of water at 30°C are converted into steam at 250°C at constant atmospheric pressure. The specific heat of water is assumed constant at 4.2 J/g K and the latent heat of vaporization at 100°C is 2260 J/g. For water vapour, assume pV = mRTwhereR = 0.4619 kJ/kg K, and

C_p/R = a + bT + cT², where a = 3.634,

b = 1.195 × 10^-3K-1 and c= 0.135 × 10^-6K^-2

Calculate the entropy change of the system.