Given the reaction 2X(g) + Y(g) doubleheadarrow 2Z(g) Delta H = -335 kJ combinat

Question

Given the reaction 2X(g) + Y(g) doubleheadarrow 2Z(g) Delta H = -335 kJ combination of pressure and temperature give highest yield of Z at equilibrium? a) 1000 atm and 500 degree C b) 1000 atm and 100 degree C c) 500 atm and 500 degree C d) 500 atm and 100 degree C e) none of the above Use molecular orbital theory to determine the order for the O*_2 ion. a) 1 b) 1.5 c) 2 d) 2.5 e) none of the above K_c for the reaction. CH_4(g) + H_2O (g) doubleheadarrow CO(g) + 3H_2(g) at 1500 degree C is 5.67. What is K_c for the CO(g) + 3H_2 doubleheadarrow CH_4(g) + H_2O(g) a) 11.3 b) 2.84 c) 0.00325 d) 0.176 e) none of the above

Explanation / Answer

(13)

(b) 1000 atm and 100 degreeC

Because, the forward reaction is exothermic it can be favoured by lowering temperature and the number of gase moles decreases form 3 to 2 hence it can be favored by increase in pressure.

(14)

(d) 2.5

In O2 molecule two electron occupy antibonding molecular orbital and its bond order is 2.

So, while formation O2+ ion the electron is to be removed from the antibonding molecular orbital hence the bond order is more than that of O2.

(15)

Kc' fro the reverse reaction = 1 / Kc for the forward reaction

Kc' = 1 / 5.67

Kc' = 0.176

(d)

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