PART III: CHEMISTRY

SECTION 1 (Maximum Marks: 24)

This section contains EIGHT (08) questions.

The answer to each question is a NUMERICAL VALUE.

For each question, enter the correct numerical value of the answer using the mouse and the onscreen virtual numeric keypad in the place designated to enter the answer. If the numerical value has more than two decimal places, truncate/round off the value to TWO decimal places.

Answer to each question will be evaluated according to the following marking scheme:

Full Marks : +3 ONLY if the correct numerical value is entered;

Zero Marks : 0 In all other cases.

2 mol of Hg(g) is combusted in a fixed volume bomb calorimeter with excess of O 2 at 298 K and 1 atm into HgO(s). During the reaction, temperature increases from 298.0 K to 312.8 K. If heat capacity of the bomb calorimeter and enthalpy of formation of Hg(g) are 20.00 kJ K -1 and 61.32 kJ mol -1 at 298 K, respectively, the calculated standard molar enthalpy of formation of HgO(s) at 298 K is X kJ mol -1 . The value of |X| is____ [Given: Gas constant R = 8.3 J K -1 mol -1 ]