Q5) 1 mol NH3 is compressed to 10 L via isothermal process in 101.325 kPa and 423 K. Calculate the work under following conditions. (1) Assume the gas is an ideal gas. (2) Assume the gas satisfies Van der Waals Equation. = 0.417 6 2, = 3.71 105 3 1.

Q6 )

H2(g)+ 1 2(g)=H2 (l), molar reaction enthalpy (298 ) = 285.84 1 . 2

Calculate the molar reaction enthalpy of the reaction in 800 K. Molar enthalpy of vaporization of 373 K water is 40.65 1.

,(2,)=29.071 1 +(8.36104 1 2) ,(2,) = 36.16 1 1 + (8.45 104 1 2) ,(2, ) = 30.00 1 1 + (10.7 103 1 2) ,(2, ) = 75.26 1 1