For reaction 2HI( g ) = H 2 ( g ) +I 2 ( g ), of HI( g ) and I 2 ( g ) are 1.7 kJ·mol -1 and 19.3 kJ·mol -1 respectively. (1) At 298.15K and under their standard conditions, predict the direction of the reaction. (2)When T =298.15K =100kPa, =10.0kPa, =1.0kPa, show the direction. (3)What is the equilibrium constant?