Vapour pressures of water above pure liquid water are 24, 529 and 760 torr respectively at 298, 363 and 373k. use these data to answer the questions
(i). change in chemical potential (in kj/mol) for the equilibrium h2o (liquid) = h2o (gas) at 298 k is
(a) 8.6 (b) – 3.8 (c) 7.87 (d) 3.72
(ii). aqueous solution of sodium chloride (χnaclz8isuvork5cyii= = 0.015) at 298 k is in equilibrium with a water vapour pressure (in torr) of
(a) 23.64 (b) 748.60
(c) 24.36 (d) negligible
(iii). average value of enthalpy of vaporization (in kj/mol) of water between 363 and 373 k is
(a) 42.50 (b) 4.080
(c) – 40.65 (d) -40.80