TS EAMCET Practice Quiz

Question 1

For a spontaneous process occurring at constant temperature and pressure, which thermodynamic quantity must decrease for the system?

Accepted Answer

Gibbs free energy, G

Question 2

For the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), if the equilibrium constant Kc = 0.50 at a certain temperature, what is the value of Kc for the reverse reaction at the same temperature?

Accepted Answer

2.0

Question 3

For the reaction 2A(g) ⇌ B(g), Kp = 0.50 at a certain temperature. What is Kc if R = 0.0821 L atm mol^-1 K^-1 and T = 300 K?

Accepted Answer

12.3

Question 4

One mole of an ideal gas expands reversibly and isothermally at 300 K from 10 L to 20 L. What is the work done by the gas? (Use R = 8.314 J mol^-1 K^-1, ln 2 = 0.693)

Accepted Answer

+1728 J

Question 5

For the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), if the concentration of O2 is doubled while keeping temperature constant and the system is not yet at equilibrium, the reaction quotient Qc becomes

Accepted Answer

halved

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