1.The hydrogen gas used in the Haber process is made by the following reaction:
CH, (g) + H2O (9) = CO (g) + 3H (9) AH = + 206 kJ/mol
Which of the following sets of conditions will favor the formation of hydrogen
gas?
A)High pressure and low temperature
B)High pressure and high temperature
C)Low pressure and low temperature
D)Low pressure and high temperature
2.Calculate the activation energy (Ea) of a reaction that has a rate constant
4.50 x 10's at 1 °C and a rate constant of 100 x 10* s at 10 C?
(R = 8.314 J/mol.)
A)79.2 kJ/mol
B)57.2 kJ/mol
C) 115 kJ/mol
D)246 kJ/
mol
3. If the equilibrium constant, Kc = 0.0140 at 100.0 °C, for the following
reaction:
2NOB (g) = 2NO(g) + Bry (9)
What is the value of Kp at the same temperature for the following reaction?
2NO(g) + Br (9) 2NOBr (9)
A)5.44
B)2.33
C)8.53
D) 71.4
4. Methanol can be produced by the following reaction:
2H, () + CO (9) - CH,
OH(g)
When 2.00 mol of H, and 1.00 mol of CO are mixed, and heated to an
elevated temperature in a container of volume 1.5 L, the equilibrium yield of
CH, OH is 0.600 mol
What is the value of the equilibrium constant, Kc for this reaction at the same
temperature?
A) 5.29
B) 14,6
C) 0.034
D) 56.6
5. The reaction: 2 NO. (9)+ 0, (q) + 4 NO, (g)
is first order in N, O, with a rate constant k = 1.0 x 10*s" at 45 °C.
Starting with an initial N, O, concentration of 10 x 10-M, what will be the
N, Oconcentration after 2.0 x 10's?
A) 5.5 x 10M
B) 3.7 x 10-*M
C)1.4 x 10 M
D]4.1 x 10M