Question

POTENTIALLY MULTIPLE CORRECT ANSWERS FOR EACH

Which of the following is correct?

(a) Exothermic reactions are spontaneous
(b) Reactions with ∆S > 0 are spontaneous
(c) For reactions with increasing number of moles, ∆S > 0
(d) When ∆H > 0, ∆S > 0, with increasing temperature, ∆G will decrease

Which reaction of the following measured at the standard condition gives ∆G◦f (CO2(g))?

(a) CO(g) + C(s) → CO2 (g)

(b) CO(g)+1/2O2(g)→CO2(g)2

(c) C(s)+O2(g)→CO2(g)

(d) 2C(s)+2O2(g)→2CO2(g)

When a reaction reaches equilibrium, which of the following is correct?

(a) ∆G=0

(b) ∆G◦ = 0

(c) ∆G◦ < 0

(d) ∆G◦ = ∆G

(e) Q=K

(f) lnK=0

At a constant temperature, initially 1.00 mol SO3 was filled into a 1.00 L container , after reaction 2SO2(g)+O2(g) → 2SO3(g) reached equilibrium, number of moles for SO2is 0.60 mol. What is the equilibrium constant K for the above-mentioned reaction?

(a) 2.8

(b) 2.2

(c) 1.5

(d) 1.9

For reaction Cl2(g) + 3F2(g) → 2ClF3(g), what is the relation between the equilibrium constant defined with concentration Kc and the equilibrium constant defined with partial pressure Kp?

(a) Kp = Kc
(b) Kp=Kc(RT)^−1

(c) Kp=Kc(RT)^2

(d) Kp=Kc(RT)^−2

[6] At the same temperature and pressure, consider reactions (1) A + B → 2C, and (2)1 A + 1 B → C, what is the relationship between their standard free energy changes and equilibrium constants

(a) ∆G1 = 2∆G2, K1 = K2

(b) ∆G1 = 2∆G2, K1 = (K2)^2

(c) ∆G1 = ∆G2, K1 = (K2)^2

(d) ∆G1 =∆G2, K1 =K2

Which of the following is true about light?

(a) Light is a wave and a particle at the same time

(b) Photon is quantized electromagnetic radiation

(c) Any object can emit electromagnetic radiation even if it is a blackbody

(d) In photoelectric effect, emitted photoelectron’s kinetic energy is proportional to the. incident photon’s frequency

De Broglie equation of wavelength of matter λ = h/(mv) can be applied to which of the following cases?

(a) When the matter is macroscopic and mass is larger than 1 kg, such as a human

(b) When the matter is microscopic particle and the mass is smaller than an atom

(c) When the matter behaves like a particle
(d) When the matter is traveling in the speed of light

Answer 1

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